Nearly a year ago, we rescued a chihuahua (12% dachshund) who we think is around 9 years old. He came to us with itchy ears, inflamed feet that he licks constantly (and sometimes bites), and other signs of potential allergies that we haven't been able to fix. The vet told us this is common with chihuahuas and we could spend his whole life doing "detective work" and never figure it out. We have tried three different foods but nothing helps. He's not miserable but we'd like him to be more comfortable. We've used prescription creams, foams, etc. Is it possible he could have some sort of allergic problem? Is there something we haven't thought of? Could anyone recommend foods or medicines or something we could try? Thank you!