My cat has been throwing up most everything she eats for over a month now. In the last 2 months, she went from 9.5 lbs to 6.2 lbs. I have taken her to the vet 3 times already (2 separate vets to be exact- one that specializes in cats). The blood work and thyroid test came back normal. The x-ray didn't show any issues either. Everything looked good, nothing enlarged. They couldn't find anything wrong in the exams. I have had her on only baby food for days and she is now throwing it up. I have tried the prescription gastro food, and she throws it up also. Prior to throwing up, she was on the same food for years, which was Blue Buffalo Wilderness (not some cheap crappy food). She acts pretty lethargic at this point. I'm sure she doesn't actually feel well. I have no clue what else to do. Please help!!