I have a 10 week old kitten and I took him to the vet today because he kinda stopped eating and playing with my other 3 cats. He weighs 1.8 pounds. Is that normal?? He feels real skinny to me. The vet also gave him some penesillan (sorry I cannot spell) to make him feel better so he starts eating normal again. He justs lays around and never plays anymore. Has anyone ever had this experience with a kitten before?