I adopted a 4-month-old kitten from my local animal shelter that was a stray before he was rescued. He was neutered and given all his shots before I got him. The first few days I had him, he was very energetic, playful, and ate a good bit. In the past couple of days, he has become extremely lethargic (sleeping basically ALL day) and barely eating at all. The only thing I can get him to eat is the Purely Fancy Feast Hand Flaked Chicken. I took him to the vet a couple days ago to get a check up and the veterinarian listened to his heart and lungs and told me he was fine, but he has still not gotten any better. He is getting really thin and has been really worrying me. I bought him some Blue Buffalo Wilderness food today and he ate a very small amount. If anyone has any helpful comments or thoughts, please let me know, it will be so greatly appreciated!!