The most top of the line super premium food will be worthless if your dog is intolerant to one or more ingredients it contains.
You need to figure out what’s causing the problem and eliminate it. Keep in mind that dogs can be intolerant of much more than animal protein or grain and that true allergies are extremely rare. For example, my dog is intolerant of fish, flax, rice, barley, wheat, millet, chickpeas, lentils, tomato, garlic, etc…. the list goes on.
You need to start by choosing a very simple food with a protein and a starch that are both novel to your dog. If you’re up for it, you can conduct a true elimination diet, but they require strict discipline.
One food you might consider is California Natural Lamb & Rice, assuming she hasn’t had either lamb or rice previously.
