I have fed my three cats Taste of the Wild Rocky Mountain Feline formula without any problems for about 8 months. Last time I went to TSC, they only had the fish formula (don't remember what it is called) and they were out of the one I usually feed them. Not thinking it was any big deal, I picked up the bag. My two younger cats (1.5 years and 9 months) have no problem eating it. My older cat, we rescued her from a school where she was abandoned 6 years ago, will sometimes eat it and puke it up within 10 minutes. Other days, she will be totally fine after she eats it. Whenever I have tried to give her fish wet food in the past, she would not eat it and I couldn't figure out why. It could be some other problem, but I really think it is just the food. Is there anything I can do to ease her stomach issues, or do I just need to chuck the 20lb bag? I can't return it since I already threw out the bag it came in.
