Hi there! I am new to this site. I have 2 kittens that were just fixed,one had worms so they treated him. Since he has been back home he has not been himself. He first started off sneezing all the time but now he is throwing up and has a runny stool. Would this be because of the worm medicine? The other cat that didn't have worms is fine he plays outside all day. Any information you can give me would be greatly appreciated.