to the site. Vets can do allergy testing but it will just give you a based line and is not always 100% accurate nor does it catch everything they could be allergic to. A lot of bullies allergies are food related whether they are allergic to various grains, veggies or proteins. It could be that your Lola is allergic to the salmon the potato or both. You may have to try several different foods before you find the right one that she can tolerate as what works for one bully may not work for another. Also, please remember they have sensitive tummy's so if you do go with a food switch to do it slowly over a 10 to 20 day period to give her time to adjust and that it can take up to a month for the old food to get out of her system. In our case my Harlea has a mild allergy to salmon and salmon oil which causes her to get a bit itchy and have horrible tear stains and is currently eating Fromm's grain free game bird and is doing wonderful on it.