Most likely, a switch to raw food will alleviate allergic symptoms your pet may be having. Many pets are allergic to protein in grains. These allergies can be seen in symptoms of chronic yeast infections, skin rashes and stiff joints or arthritic conditions. Long-term exposure to large amounts of grains, for these animals, can be a precursor to more serious and permanent illness over time. But, it is never too late to switch to a raw natural diet. Pets of any age can be given a new diet and benefit from it very quickly.