I just recently got a Ragdoll kitten... and he is starting to lose his hair under his arms and on his stomach... under his arms is pretty much gone and on his stomach it is very thin. The first few days we had him he cleaned himself A LOT in those areas. We took him to the vet two days ago and they did a skin scraping and nothing came up. He had no fleas or mites. They gave me Revolution anyway and some shampoo to use on him and said to start giving him baths. What could cause this? I am so worried about my baby... has anyone else experienced this with their cats or kittens?