My cat has been throwing up for the past day and night. This isn't like her, she'll sometimes be sick if she's eaten too much but it's usually a one off. What can I do to help her feel better? Any ideas what it could be? As far as I can tell, poo is normal. She seems to be herself and doesn't seen to be sleeping more than normal, but normal for her us about 23 hrs a day. I'm worried for my little fluffy one 