I had a Westie, that past over the rainbow bridge late March, that was allergic to storage mites. Storage mites are basically in anything stored on shelves in warehouses or stores for longer periods of time, like dry kibble, flour, grains and the like. So essentially he couldn't eat any dry nothing, so we went on raw and he did great. Of course he was also allergic to mold and flea saliva. Mold allergy and living in Houston, TX is a bad combo, it is everywhere, due to the humidity we have, and of course that also makes fleas very hardy. Bogus was on frontline and advantage together most of his life, that was the only way to keep fleas off of him and fur on him. He lived to be 13 years, which for me is way too young, but for a dog that has been on steroids and several meds throughout his life, realisticly it is not short. Either way, he clearly should not have been considered a breeding dog, even thought he was a beautiful example of what West Highland White Terriers should be like. My point, it depends on what type of allergies the dog has and the severity of them, in my ever so humble opinion..