Yes, I know exactly what you mean. You would never know that Miko has anything wrong with him at all. He's such a playful, sweet yorkie
If you're going to feed Hill's, I would feed the canned because their dry foods contain something called ethoxyquin which is considered a carcinogen and is banned from human foods because of this. The canned food is good for them though, from what I have heard, that's why I feed the canned u/d and Miko actually likes it! But the u/d is for stones, so your baby will prob be put on the k/d. Another food to consider is the Royal Canin Hepatic LS 14 dry food. It doesn't have the ethoxyquin in it, and I guess it's tasty because Miko was a very picky eater before he started eating it, and he loved it. I guess it's because that's what his body needed
Good luck!