My cat goes through these 1-2 week stages when she throws up her food. I know it's hairballs because there will be hair in the vomit. Also, I will occasionally notice these pellets of fur (look like bullets of hair) that she's thrown up. Usually the problem will go away on its own and she won't throw up for a few months or more. This stage has been on and off for about a month, though. I'll think she's over it, then she'll throw up again. I always give her a dab of cat lax each day, and comb her with a fine tooth comb every other day to remove loose hair. She also seems to have a sensitive tummy, and some foods make her more barfy than others. I have her on Maxximum Nutrition dry, and she's been doing well on that. I don't know what else to do. I've taken her to the vet for it, but they don't have any answers. They always say cats will barf occasionally, but if it becomes a chronic thing, then we'll take some x-rays. They believe it's just hairballs, and will give me cat lax. What else can I do that I'm not already doing? I've thought about changing her food time to evening because she seems to keep food down better in the afternoon (I give her a 1/2 of food in the morning, then a small handful (her snack) in the afternoon). Does anyone else have a cat like this? I thought it could be worms since I've seen some fleas around. I plan to have her in for her annual once my work schedule gets settled (this is my first week), and I'll ask about worming. She's had tapeworms, but I noticed eggs around the house when she had those...