I just got a pair of 6 week old kittens. One of them, the male, has been throwing up since the third day he's been home. I've had him for eight days now. He has been throwing up once a day. He'll be sleeping and then wakes up and throws up. It's devastating to see him do that. But other than that he's a happy kitty. Good appetite, playful, running around and causing trouble with his sister. If anything he's more aggressive than she is, though she is slightly bigger. Also he doesn't like to be picked up, but I think he's more of a loner than his sister. He can be hugged but meows, but it doesn't sound like an angry or hurt meow. I'm just curious to see if anyone else had experienced this. Hopefully we can get them both to the vet on Saturday.