Best Joint Supplements for Senior Dogs (8 Compared, Vet-Sourced)

By Sarah Bennett · Last updated May 21, 2026 · 14 min read

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The best joint supplements for senior dogs combine glucosamine, chondroitin, MSM, and omega-3 fatty acids — sometimes in one product, more often across two. The most widely vet-recommended brands in North America are Cosequin Maximum Strength and Dasuquin Advanced from Nutramax. For omega-3 specifically, Nutramax Welactin is the most-cited research-backed option. NASC certification is a useful baseline quality signal, though several reputable brands (including Nutramax) operate outside that program with their own quality controls.

Osteoarthritis affects roughly 80% of senior dogs, according to the American Veterinary Medical Association, and it is the most common cause of lameness in dogs older than one year. By the time symptoms appear, the underlying joint changes have usually been progressing for months. That is why most senior dog parents start asking about joint supplements before their vet officially flags the issue.

We compared the eight most-recommended joint supplements for senior dogs against six criteria. We use some of these in our own household for Lucy, our 7-year-old Border Collie, who does not have arthritis yet but is the reason we started researching senior care early. The rest we researched against the published veterinary literature and the manufacturers' current ingredient labels.

What follows is what we found — what works, what does not, and which supplement fits which kind of senior dog.


How We Compared These Joint Supplements

We scored each joint supplement across six dimensions:

  1. Glucosamine content (mg per maintenance dose). Research consistently identifies glucosamine as the most-studied joint ingredient for dogs.
  2. Chondroitin content (mg). Works synergistically with glucosamine.
  3. MSM (methylsulfonylmethane, mg). Anti-inflammatory contribution; useful when present, not essential.
  4. Omega-3 fatty acids (EPA + DHA, mg). Has stronger published anti-inflammatory evidence than glucosamine alone (see Bauer, J.E., 2016. The essential nature of dietary omega-3 fatty acids in dogs. JAVMA 249(11)).
  5. Third-party quality certification. The National Animal Supplement Council (NASC) Quality Seal is the most widely recognized industry baseline. Important nuance: not every reputable brand chooses to participate. Nutramax, for example, operates outside NASC with its own published quality program. The absence of an NASC seal is not by itself a quality red flag, but its presence is a real plus.
  6. Price per month at standard maintenance dose (for a 40-pound dog). Pricing changes frequently; verify on the brand's current product page before ordering.

What we did not use as criteria: brand marketing claims, social media reviews (often paid), or "veterinarian-formulated" labels without disclosed formulator credentials.

Important reminder: Joint supplements take 4–8 weeks to show effect on most dogs. Judging based on the first month is unreliable. Always discuss any supplement with your vet, especially if your dog is on prescription medication.


Quick Comparison

The table below reflects current standard formulations as of writing. Manufacturers occasionally adjust formulas, so verify ingredient amounts on the brand's product page before ordering.

Product Glucosamine Chondroitin MSM Omega-3 NASC Seal Format
Cosequin Maximum Strength (with MSM) 600 mg 300 mg 250 mg No (Nutramax program) Chewable tablet
Dasuquin Advanced for Large Dogs 900 mg 350 mg 800 mg No (Nutramax program) Chewable tablet
Nutramax Welactin Omega-3 Liquid EPA 870 + DHA 570 / 6 mL scoop No (Nutramax program) Liquid
PetLab Co. Joint Care Chews Disclosed but mg not published Disclosed but mg not published Anchovy oil added Listed; no Quality Seal Soft chew
Front of the Pack Move Yes (mg not published) Yes (mg not published) Yes (mg not published) — (not in Move formula) Not listed Powder
Native Pet Relief Yes (Quality Seal) Soft chew (anti-inflammatory class)
Honest Paws Mobility 500 mg 50 mg Yes (Quality Seal) Soft chew (with hemp/CBD)
VetIQ Hip & Joint (Standard) 600 mg 210 mg Krill oil added Yes (Quality Seal) Soft chew

A note on NASC: of the eight products above, three carry the NASC Quality Seal (Native Pet, Honest Paws, VetIQ). One is a listed audited member without the Quality Seal (PetLab Co.). Four operate outside NASC (the three Nutramax products and Front of the Pack). NASC membership status was confirmed on the NASC member directory at nasc.cc.


1. Cosequin Maximum Strength (with MSM) — Best Vet-Recommended Baseline

Best for: Senior dogs in early-to-moderate joint changes. The most widely vet-recommended joint supplement in North America.

What's in it (per chewable tablet):

  • Glucosamine HCl: 600 mg
  • Sodium Chondroitin Sulfate: 300 mg
  • Methylsulfonylmethane (MSM): 250 mg
  • Sodium Hyaluronate (HA): 6 mg
  • Manganese: 3 mg

Why it's widely recommended:

  • Nutramax has funded and published multiple veterinary research studies on joint supplementation over more than thirty years.
  • Available almost everywhere (Amazon, Chewy, vet clinics, PetSmart, Walmart).
  • No proprietary blends — every ingredient amount is disclosed on the label.
  • Long track record of consistent formulation.

What we like:

  • Predictable quality and consistency.
  • Easy to find at multiple retailers.
  • The Maximum Strength formulation includes MSM and hyaluronic acid, which are absent from the basic Cosequin SKU.

What we don't like:

  • No omega-3 — must supplement separately (Welactin from the same brand is the obvious pairing, see #3).
  • Nutramax does not participate in NASC. Their own quality program is well-established, but readers who prioritize third-party certification may prefer a NASC-sealed alternative.
  • Chewable tablets are firm; some senior dogs with dental issues find them hard to chew.

Where to buy: Widely available on Amazon and Chewy. Pricing for a 40-pound dog at maintenance dose typically falls in the $20-30/month range — verify the current product page before ordering. [Affiliate link to Amazon]


2. Dasuquin Advanced for Large Dogs — Best Premium Glucosamine Formula

Best for: Senior dogs with established arthritis, large breeds at high genetic risk, or any senior dog whose vet has recommended stepping up from Cosequin.

What's in it (Large Dog formulation, per chewable tablet):

  • Glucosamine HCl: 900 mg
  • Sodium Chondroitin Sulfate: 350 mg
  • Methylsulfonylmethane (MSM): 800 mg
  • Avocado/Soybean Unsaponifiables (ASU): 90 mg
  • Boswellia Serrata extract: 40 mg
  • Green Tea extract: 32 mg

(A Small-to-Medium Dog formulation is also available with proportionally lower amounts.)

Why it's worth the premium over Cosequin:

  • Significantly higher glucosamine and MSM doses.
  • Adds ASU, which has a published research base in canine osteoarthritis as a slow-acting symptomatic agent. Recent veterinary reviews note its analgesic and anti-inflammatory effects through inhibition of inducible nitric oxide synthase and MMP-13.
  • Adds Boswellia serrata, an anti-inflammatory botanical with growing evidence in canine OA contexts.

What we like:

  • Most "complete" formula in the Nutramax line.
  • Often cited by veterinary specialists for moderate-to-severe cases.
  • Same long-standing manufacturer track record as Cosequin.

What we don't like:

  • Significantly more expensive than Cosequin.
  • Still no omega-3 — must supplement separately.
  • Same caveat as Cosequin on NASC membership: not part of the program.

Where to buy: Available on Amazon, Chewy, and from many vet clinics. Pricing typically falls in the $30-45/month range for the Large Dog formulation — verify current pricing before ordering. [Affiliate link to Amazon]


3. Nutramax Welactin Omega-3 — Best Research-Backed Omega-3 Add-On

Best for: Pairing with Cosequin or Dasuquin to complete the joint-support stack. Or as a standalone for dogs already on glucosamine elsewhere.

What's in it:

  • Liquid concentrate (6 mL scoop): EPA approximately 870 mg + DHA approximately 570 mg, combined omega-3 fatty acids approximately 1,770 mg.
  • Softgel: EPA approximately 155 mg + DHA approximately 100 mg per softgel.
  • Available as liquid, softgels, and soft chews.

Why omega-3 matters:

  • Omega-3 fatty acids carry stronger published anti-inflammatory evidence than glucosamine alone. A 2016 review by J.E. Bauer in the Journal of the American Veterinary Medical Association (vol. 249, issue 11) is widely cited as the reference paper on dietary omega-3 essentiality and therapeutic dosing in dogs.
  • The right therapeutic dose for a given dog is calculated by metabolic body weight, not by a simple mg-per-kg conversion, and the NRC's safe upper limit is 280 mg of combined EPA and DHA per 100 kcal of food, per Bauer's review. Talk to your vet about your dog's specific dose.

What we like:

  • Liquid format makes dosing precise.
  • Same Nutramax manufacturer as Cosequin and Dasuquin.
  • Multiple formats (liquid, softgels, soft chews) for owner preference and dog tolerance.

What we don't like:

  • Liquid can spill if a dog is fidgety at meal time; softgels solve that but cost more per month.
  • Like the rest of the Nutramax line, not part of NASC.

Where to buy: Available on Amazon and Chewy in all three formats. Pricing for a 40-pound dog typically falls in the $20-30/month range for the liquid — verify current pricing. [Affiliate link to Amazon]


4. PetLab Co. Joint Care Chews — Best Subscription Soft Chew

Best for: Dogs that prefer soft chews over tablets. Owners who want a subscription model with auto-renewal and direct shipping.

What's in it:

  • Glucosamine HCl
  • Chondroitin sulfate
  • Anchovy oil (omega-3 source)
  • Calcium fructoborate
  • Green-lipped mussel
  • Turmeric (Curcumin / Curcugen 25 mg)

PetLab Co. discloses the ingredient list but does not consistently publish individual milligram amounts for glucosamine, chondroitin, or MSM on the public product page. If precise mg-per-chew transparency matters to you, that is a factor.

Why it's popular:

  • Soft chew format — easier than tablets for senior dogs with dental issues.
  • Subscription model with recurring discount.
  • Strong direct-to-consumer marketing.

What we like:

  • Easy administration (most dogs eat the chews as treats).
  • Listed as an audited member of NASC (though without the displayed Quality Seal at the time of writing — confirm current status on the NASC member directory).
  • Multi-ingredient formula in one chew.

What we don't like:

  • Individual ingredient mg amounts not published on the public product page, which limits direct comparison.
  • More expensive per month than Cosequin equivalents.

Where to buy: Direct from PetLab Co.'s official site (subscription is the default route). Pricing varies with subscription tier — verify current pricing and any affiliate-exclusive discount before ordering. [Affiliate link to PetLab Co.]


5. Front of the Pack Move — Best All-in-One Joint Powder

Best for: Dog parents who prefer powder formats over chews or tablets, and who value transparent ingredient sourcing.

What's in it (six-ingredient formula):

  • Native Type II Collagen
  • Calcium fructoborate
  • Glucosamine HCl
  • Methylsulfonylmethane (MSM)
  • Chondroitin sulfate
  • Curcumin phytosome complex

The Move formula does not include omega-3 fatty acids — those live in a separate Front of the Pack product called The One. Several reviews online incorrectly lump the two together; we verified the Move ingredient list directly against the brand's current product page.

Why it's positioned differently:

  • Focused on joint structure and inflammation, not on omega-3.
  • Includes native type II collagen, which appears in a small but growing veterinary research base for canine arthritis.
  • Sourcing transparency on the website.

What we like:

  • Powder format makes it easy to mix into food, which suits dogs that refuse tablets or chews.
  • Sourcing transparency and a clean ingredient list.
  • Six-ingredient formula keeps the label readable.

What we don't like:

  • Front of the Pack does not appear in the NASC member directory.
  • Premium pricing.
  • Newer brand than Nutramax, so less long-term track record.
  • Subscription pressure on the website checkout flow.

Where to buy: Direct from Front of the Pack's official site. Pricing for a 40-pound dog typically falls in the $40-60/month range — verify current pricing. [Affiliate link to Front of the Pack]


6. Native Pet Relief Chews — Best Anti-Inflammatory Alternative

Best for: Owners looking for a non-glucosamine, anti-inflammatory route as a complement (not a replacement) to a traditional joint supplement.

What's in it:

  • Green-lipped mussel
  • Polyphenols
  • Turmeric extract (95% curcumin)
  • Black pepper extract (improves curcumin absorption)
  • Collagen

Native Pet Relief Chews are different from the other products on this list. They are an anti-inflammatory chew — they do not contain glucosamine, chondroitin, or MSM. The Native Pet brand also makes a separate Hip+Joint Advanced Care powder, which is the glucosamine-based product in their line; if your goal is a glucosamine supplement specifically, that is the SKU to look at.

Why this still belongs on the list:

  • Green-lipped mussel itself contains glucosamine, chondroitin, and omega-3 in natural form.
  • Curcumin has a research base for inflammation, including in canine contexts.
  • For dogs that are stiff but in early enough stages to skip a full glucosamine regimen, this can be a reasonable starting point.

What we like:

  • Clean, short ingredient list. No artificial colors.
  • Soft chew format.
  • Carries the NASC Quality Seal.

What we don't like:

  • Easy to misread the marketing and assume it is a traditional glucosamine supplement, which it is not.
  • Less directly comparable to Cosequin/Dasuquin on a glucosamine-per-day basis.

Where to buy: Direct from Native Pet's site, also on Amazon. Pricing typically falls in the $30-45/month range — verify current pricing. [Affiliate link to Native Pet]


7. Honest Paws Mobility — Best CBD-Inclusive Option

Best for: Dog owners interested in CBD as an adjunct to traditional joint support, after a conversation with their vet.

What's in it (per soft chew):

  • Glucosamine HCl: 500 mg (shrimp & crab source)
  • Chondroitin sulfate: 50 mg (avian source)
  • Boswellia serrata: 15 mg
  • Organic full-spectrum hemp oil: 7 mg, of which approximately 5 mg is naturally occurring CBD
  • Hyaluronic acid: 3 mg

Honest Paws Mobility does not contain MSM.

On CBD specifically:

The evidence base for CBD in canine osteoarthritis is growing. A 2018 randomized, placebo-controlled, owner-and-veterinarian-blinded crossover study by Gamble and colleagues at the Cornell University College of Veterinary Medicine, published in Frontiers in Veterinary Science, reported a significant decrease in pain and an increase in activity at a CBD dose of 2 mg per kg of body weight given twice daily over four weeks. That is approximately 50 mg twice daily for a 25-kg dog. The 5 mg of CBD per chew in Honest Paws Mobility is well below the dose studied at Cornell — useful as an add-on, but not a substitute for a vet-supervised CBD regimen if therapeutic dosing is the goal.

What we like:

  • Independent third-party testing of the hemp oil.
  • USDA Organic hemp source.
  • Multi-ingredient formula in one chew.
  • Carries the NASC Quality Seal.

What we don't like:

  • CBD dose per chew is much lower than the level used in the Cornell study.
  • More expensive than non-CBD options.
  • Some vets remain cautious about CBD recommendations until more research is published.

Critical: Tell your vet before starting CBD, especially if your dog is on other medications. The Cornell study did not show short-term side effects at the studied dose, but interactions with prescription medication are not ruled out.

Where to buy: Direct from Honest Paws' site. Pricing typically falls in the $40-60/month range — verify current pricing. [Affiliate link to Honest Paws]


8. VetIQ Hip & Joint — Best Budget Option

Best for: Budget-conscious owners with mild senior dog joint changes. Or as an introductory joint supplement before stepping up to premium options.

What's in it (Standard Formulation, per serving):

  • Glucosamine HCl: 600 mg
  • Methylsulfonylmethane (MSM): 210 mg
  • Krill (omega-3 fatty acid source): 210 mg

(A separate VetIQ Advanced Formulation is also available with higher doses: 1,000 mg glucosamine + 1,000 mg MSM + 350 mg chondroitin per three soft chews.)

What we like:

  • Lowest per-month cost of the supplements compared here.
  • Widely available (Walmart, Amazon, PetSmart, Sam's Club).
  • Carries the NASC Quality Seal.
  • Includes a krill-sourced omega-3 contribution, unlike Cosequin or Dasuquin.
  • Soft chew format is easier on senior teeth than tablets.

What we don't like:

  • The Standard Formulation does not list chondroitin among headline active ingredients — if chondroitin specifically matters to you, look at the Advanced Formulation or a Nutramax product.
  • Less premium positioning, though that is part of the value proposition.
  • Mid-tier ingredient amounts compared to Dasuquin Advanced.

Where to buy: Amazon, Walmart, PetSmart. Pricing for a 40-pound dog typically falls in the $10-20/month range — verify current pricing. [Affiliate link to Amazon]


How to Choose the Right Joint Supplement for Your Senior Dog

There is no single "best" — the right pick depends on your dog's stage, dental ability, budget, and any other medications they are on. A few clear matches:

If your dog is in early joint changes (slight stair hesitation, occasional stiffness):

  • Cosequin Maximum Strength + Welactin Omega-3 separately, or
  • VetIQ Hip & Joint Standard if budget is the primary factor

If your dog is in established moderate arthritis (consistent stair hesitation, daily stiffness):

  • Dasuquin Advanced for Large Dogs + Welactin Omega-3, or
  • Front of the Pack Move as a powder all-in-one for dogs that refuse tablets

If your dog has dental issues and cannot chew tablets:

  • PetLab Co. Joint Care Chews (soft), or
  • Native Pet (soft chews — note this is the anti-inflammatory route, not glucosamine)
  • Welactin Omega-3 in liquid form

If your dog is on prescription medication:

  • Stay with established, well-studied formulations (Cosequin, Dasuquin, Welactin) and talk to your vet first.
  • Discuss any CBD product with your vet before starting.
  • Discuss turmeric-containing supplements with your vet, as curcumin can interact with some medications.

If you specifically want NASC Quality Seal certification:

  • Native Pet, Honest Paws, or VetIQ.
  • Note that the absence of an NASC seal is not by itself a quality red flag — both Nutramax and Front of the Pack operate outside NASC with their own quality programs.

How Long Until Joint Supplements Work?

Joint supplements take 4–8 weeks to show a visible change in most dogs. The first two weeks rarely show anything. Judging based on the first month is unreliable.

What changes when they are working:

  • Slower stairs become slightly easier.
  • Morning stiffness reduces.
  • Willingness to go on walks increases.
  • Less hesitation before jumping (where jumping is appropriate — many senior dogs should not be jumping at all).

What does not change:

  • Advanced arthritis does not reverse.
  • Pain levels that already require NSAIDs are not replaced by supplements alone.
  • Severely damaged joints need prescription pain management, not just supplements.

If eight weeks of consistent daily dosing brings no visible change, talk to your vet about prescription options or a different supplement formulation. Don't keep paying for a product that isn't doing anything.


Joint Supplements vs. Prescription Pain Medication

Joint supplements and prescription NSAIDs serve different roles:

Aspect Joint supplements Prescription NSAIDs
Mechanism Support joint structure and modulate inflammation Reduce pain and inflammation directly
Speed of effect 4–8 weeks Hours to days
Long-term safety Excellent Requires periodic bloodwork monitoring
Cost per month $20-60 Varies; commonly $20-80

The FDA has approved six NSAIDs specifically for dogs: carprofen, meloxicam, grapiprant (Galliprant), firocoxib, deracoxib, and robenacoxib. There are also two FDA-approved injectable options targeting joint disease directly: Adequan (polysulfated glycosaminoglycan, the only FDA-approved disease-modifying osteoarthritis drug for dogs, approved in 1997) and Librela (bedinvetmab, a monoclonal antibody given as a monthly injection).

Many senior dogs benefit from both routes — supplements for long-term joint support, prescription medication for active pain control. This is a vet-led decision, not a supplement-alone or drug-alone choice.

⚠️ Never give your dog human pain medication. Ibuprofen (Advil), naproxen (Aleve), and aspirin can cause severe gastrointestinal ulceration and acute kidney injury in dogs, even at small doses. Acetaminophen (Tylenol) carries serious liver-toxicity risk and should only ever be used under direct veterinary supervision. According to the ASPCA Animal Poison Control Center, no over-the-counter human NSAID is approved for dogs. If you suspect your dog has been exposed, call your vet or the ASPCA Animal Poison Control Center at 888-426-4435.

For the at-home framework that pairs with whichever supplement you choose — non-slip mats, raised bowls, gentle exercise, an orthopedic bed — read our 5 at-home ways to ease senior dog arthritis.


Bringing It Together

The right joint supplement for your senior dog depends on the stage of arthritis, dental ability to chew, budget, and what other medications they're already on.

For most senior dogs in early-to-moderate joint changes, Cosequin Maximum Strength + Nutramax Welactin Omega-3 is the most evidence-supported starting combination — accessible, affordable, and from a manufacturer with decades of veterinary research behind it.

For dogs with established arthritis or larger breeds at high risk, Dasuquin Advanced for Large Dogs + Welactin is the upgrade. For dogs that cannot chew tablets, PetLab Co., Native Pet, or the Welactin liquid are the format-friendly alternatives. For dogs whose owners want the NASC Quality Seal specifically, VetIQ Hip & Joint is the budget option and Native Pet or Honest Paws are the premium ones.

Supplements alone don't carry a senior dog through arthritis. They sit alongside non-slip floors, gentle daily walks, an orthopedic bed, and — when needed — your vet's prescription. A good day for a senior dog is the product of several small things, repeated consistently.

For broader arthritis management beyond supplements, read our 5 at-home ways to ease senior dog arthritis and our best orthopedic dog beds reviews.

Sources are below.


Best Joint Supplement for Senior Dogs — Frequently Asked Questions

What is the best joint supplement for senior dogs? The most widely vet-recommended joint supplement for senior dogs is Cosequin Maximum Strength (Nutramax), with Dasuquin Advanced as the premium upgrade for established arthritis. Pair either with Nutramax Welactin Omega-3 for comprehensive coverage.

What ingredients should a dog joint supplement have? A complete senior dog joint supplement should contain glucosamine (HCl form preferred), chondroitin sulfate, and ideally MSM and omega-3 fatty acids. Green-lipped mussel, turmeric, and ASU (avocado/soybean unsaponifiables) are useful additions. NASC Quality Seal certification confirms baseline manufacturing standards, though it is not the only signal of quality.

How long does glucosamine take to work in dogs? Joint supplements take 4–8 weeks to show visible effect on most dogs. The first two weeks rarely show changes, and judging based on the first month is unreliable.

Is Cosequin or Dasuquin better for dogs? Dasuquin Advanced contains more glucosamine (900 mg vs. 600 mg in Cosequin Maximum Strength), significantly more MSM (800 mg vs. 250 mg), and adds ASU and Boswellia. It is the choice for dogs with established arthritis or large breeds at high risk. Cosequin Maximum Strength is sufficient for early joint changes and costs less per month.

Can I give my dog human glucosamine? Most human glucosamine supplements are not formulated for dogs. They may contain xylitol (toxic to dogs), wrong dosing for canine body size, or human-specific additives. Use a dog-specific supplement and discuss with your vet.

What is the best joint supplement for older large dogs? Large breeds benefit from higher-dose formulations. Dasuquin Advanced for Large Dogs + Welactin Omega-3 is the most-cited combination for senior large dogs (60+ lbs). For giant breeds (90+ lbs), discuss customized dosing with your vet.

Does green-lipped mussel work for dogs? Green-lipped mussel is a natural source of glucosamine, chondroitin, and omega-3 fatty acids. Research supports modest benefit, though the published evidence base is less robust than for dedicated glucosamine + omega-3 supplementation. It often appears as one ingredient in multi-component joint supplements (Native Pet, PetLab Co., FOTP Move).

Are joint supplements worth it for senior dogs? For most senior dogs with mild-to-moderate joint changes, the evidence supports joint supplement use as part of comprehensive arthritis management. They are not a substitute for prescription pain medication in advanced cases, and they take 4–8 weeks to show effect. Used consistently and started early, they can meaningfully extend a senior dog's mobile, comfortable years.


Sources

  • American Veterinary Medical Association — Arthritis in Dogs and AVMA Journals reporting (osteoarthritis prevalence approximately 80% in senior dogs and more than 20% across adult dogs)
  • Bauer, J.E. (2016). The essential nature of dietary omega-3 fatty acids in dogs. Journal of the American Veterinary Medical Association, 249(11), 1267–1272
  • Gamble, L.-J., Boesch, J.M., Frye, C.W., Schwark, W.S., Mann, S., Wolfe, L., Brown, H., Berthelsen, E.S., Wakshlag, J.J. (2018). Pharmacokinetics, Safety, and Clinical Efficacy of Cannabidiol Treatment in Osteoarthritic Dogs. Frontiers in Veterinary Science, 5:165 (Cornell University College of Veterinary Medicine)
  • Cornell University College of Veterinary Medicine, Riney Canine Health Center — Osteoarthritis (canine OA management framework)
  • U.S. Food and Drug Administration — Get the Facts about Pain Relievers for Pets (six FDA-approved NSAIDs for dogs; warnings about human OTC pain medications)
  • ASPCA Animal Poison Control Center — guidance on human pain medication toxicity in dogs. Poison hotline: 888-426-4435
  • Adequan Canine — FDA-approved disease-modifying osteoarthritis drug for dogs (polysulfated glycosaminoglycan, approved 1997)
  • National Animal Supplement Council (NASC) — member directory at nasc.cc; pet supplement quality certification standards
  • Manufacturer product pages for current ingredient labels: Cosequin (cosequin.com), Dasuquin (dasuquin.com), Welactin (welactin.com), PetLab Co. (thepetlabco.com), Front of the Pack (fotp.com), Native Pet (nativepet.com), Honest Paws (honestpaws.com), VetIQ via PetIQ

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About the authors: Sarah and Leo Bennett write Senior Dog Daily from the American Midwest. They adopted their Border Collie, Lucy, from a rescue four years ago and now research and share what they learn about caring for senior dogs.