A. Cats vomit for a number of reasons, hairballs and eating too fats being the most common, but what you describe could be a food sensitivity. I recommend getting her seen by your vet. Feed her the foods she tolerates bests, but it may be worth getting her seen and getting specialty bloodwork run if nothing else of significance is noted. The blood work, sent to Texas A&M's veterinary gastrointestinal laboratory, will test for various nutrient absorption problems and pancreatic enzymes, to try and narrow down what could be causing her condition.
A. This could be a couple of things going on her. She may have sensitives to certain foods (usually a protein). She may just be under the weather. If she seems to be feeling ok, drinking well, not lethargic I would try another type of food. She also needs to be eating a dry food, with the canned. I would start to reintroduce it slowly back into her diet. If you are not sure that just is a food related problem it is always a good idea to have her check for any undying health issues which may be causing the vomiting.
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