Zesty Paws Hip & Joint Bites (formerly Mobility Bites)

Which name is on the tub — a product with three of them

If you go looking for this product, the name you search decides what you find, because the manufacturer currently uses three. Read on 14 August 2026, all on the same day: the product page on zestypaws.com is headlined "Hip & Joint Bites for Dogs" (its machine data says the same), while the browser title of that very page still reads "Hip and Joint Mobility Bites™ for Dogs," and the Amazon listing we link is titled "Zesty Paws Glucosamine for Dogs – Dog Joint Supplement, Duck, 90 Ct" — with "mobility bites" surviving in its bullet copy. Same tub, one manufacturer, three names across two of its own surfaces.

Why we bother recording this: two other Zesty Paws products — Mussel Mobility Bites and Hemp Elements Mobility Bites — still carry the old name and are different formulas. An owner who types "mobility bites" into a search box can land on a different product without noticing. Check the ASIN (B01I5LWQ48) or the 1,510 mg blend line on the panel if you want to be certain you have the tub this page describes.

The naming churn is also why our score here leans so hard on what is checkable: a manufacturer that renames a product three ways while its two sales surfaces disagree about the one disclosed active (500 mg OptiMSM per 2 chews on its own site, 400 mg on its Amazon listing — both re-read 14 August 2026) is asking you to take the 1,510 mg proprietary blend on faith. We don't, and we score accordingly.

The Duck tub has chicken in it

The name on the tub is a flavor, not an ingredient list. Read on 23 October 2026, the Duck recipe's inactive ingredients on the maker's page begin "Chicken, Duck Digest, Duck Fat" and later include "Natural Chicken Flavoring." The Amazon page for the same tub prints the same chicken entries. For most dogs that changes nothing. For a dog on an elimination diet, or one whose owner has picked duck precisely to avoid chicken, it rules this tub out, and the label on the front gives no hint of it. The Bacon recipe lists no chicken, but it is not a novel-protein chew either: its chondroitin is bovine and it carries the same shellfish glucosamine and pea, garbanzo and tapioca base.

Two panels for one tub

The maker sells the same 90-count Duck tub on its own store and on Amazon, and the two pages describe it differently. All read on 23 October 2026:

None of these is a reason to think the tub is unsafe. Each is a reason not to treat either page as the label. The label on the tub in your hand is the only document that describes the batch you bought; read it, and if it disagrees with both pages, believe the tub and tell the company.

Who should not buy it

• A dog on an elimination diet, or avoiding chicken, beef, pork or shellfish. Each recipe carries at least two of those across its actives and chew base, and the Duck recipe carries chicken under a duck name.
• A dog with diagnosed osteoarthritis whose owner wants a dose to discuss with the vet. The glucosamine and chondroitin amounts are not published, so there is nothing to compare with the doses used in studies. Dasuquin with MSM prints every active per chew.
• A dog on a strict weight-loss ration, until the maker publishes a calorie figure.