Our dog’s allergies/sensitivities were diagnosed through blood work. They initially were peanuts, potatoes, & soybeans & environmental allergies. We tried a whole slew of prescription diets (even including Kangaroo!) but none quite worked. Then we went to pet stores & just read labels until we found one that worked. After that we had to read the label every time because the manufacturers would change the formulas & the only way you knew ways by reading them. Also watch out for peas in the formulas. They are a current trend but many come from China & have been treated with harmful chemicals. I have no experience with the throwing up. Good luck with that.
