My parents cat gave birth 11 weeks ago and stopped nursing her kittens completely about 1 week ago (they were still occasionally suckling for comfort..not food) The first kitten left on the weekend and the mother has been throwing up a couple times a day since then. Could this just be a coinsidence or is it anxiety over her kitten leaving. She had 4 kittens in total and over the last couple of weeks hasn't really paid alot of attention to them so I don't think she is really upset by her leaving. The weather could be a factor because we have been through a heat wave this week but it doesn't seem to affect the other cat/kittens. Is it a result of her milk drying up, although I've never heard of that either. I guess i'm just wondering if this has happened to anyone elses female after weaning. Not sure if it's just a hairball...she never has had them before. She is an indoor cat. It seems to be her food and occasionally clear bile she is throwing up. Any suggestions or comments would be helpful. Thanks