My little, 6#, Yorkie mix will be 15 years old next month. I had hoped this might give her a bit of a boost. However it seemed to make her feel bad so I stopped giving it to her before the first week was finished. But since then she became very I'll so I am not sure that the product was the cause of her decline. We will see the vet in 2 days and we will see what vet thinks. I may try again.
Also have a cat but wasn't sure cats can take this product.