Can my dog stay on his joint supplement if he's just been put on a kidney diet?

This is an important question and the timing matters. The kidney diet restricts phosphorus — most standard joint supplements contain meaningful amounts of phosphorus from their glucosamine and fish-derived ingredients, which can work against the dietary restriction the vet is trying to achieve. What supplement is he currently on?

YuMOVE Senior contains glucosamine and green-lipped mussel, both of which carry some phosphorus load. It's not catastrophic, but for a dog being managed on a kidney diet, every source of phosphorus needs to be accounted for. I'd switch him to Flexadin Advanced — it's built on undenatured type II collagen with no marine-derived ingredients and no meaningful phosphorus contribution. It addresses joint health through a completely different mechanism (oral immune tolerance) and is the cleanest choice for a dog on k/d. Mention the switch to the vet so they have the complete picture.