I have a chihuahua that seems to have allergy problems. He has had this before and the shots have always helped. This time we had tried the shot and Biomax antibiotic the first visit. No improvement so two weeks later we get another shot and Aller-chlor tablets. Still no improvement so two weeks later we get another shot andf Medrol pills. Still no improvement and just don't what else to try. He mostly sneezes first thing in the morning 8 to 10 times in a row and just seems to feel bad. Any ideas what to try? Thanks for any suggestions