Questions worth asking
What problem are you trying to solve?
Decide whether you are looking for broad nutritional supplementation, a joint-focused product, a veterinarian-directed product, or simply reassurance that the current diet is adequate. That purpose changes what information matters on the label.
Could ingredients overlap?
Compare the multivitamin with foods, treats, joint products, oils, powders, and medications already in the routine. Ingredient duplication is one reason it is useful to review the complete list with your veterinarian.
Is the product replacing medical evaluation?
New weakness, weight loss, appetite changes, pain, digestive signs, or sudden mobility changes should be evaluated medically rather than treated as a reason to add a general vitamin on your own.