I took in a stray pregnant cat when she was about to have her kittens. They are 6 weeks this sunday. One of them has started to vomit white chunky stuff up. I witnessed it once but their was a pile earlier today but I don't know which one did it. Other than the vomiting they are all playful and full of energy. I'm going to deworm them monday. Also they are all still on mothers nipple. Any thoughts on why they are vomiting? Also the one that I saw vomiting has green runny poo.