So Honey is aproximately 10 yrs old, physically she gets around better than Koko. Her teeth and ears are gosh awful! She also had crusty hard spots on her legs and on top of ears I want to start her on a low ingrediant food but what? Do I go california natural or natural balance? I wonder which one is cheaper. Which food ingredient would be best to start with? Like which one has the least allergin reaction? I don't know if she has allergies or she is recovering from living on streets. I just want to start her on something basic. Vets had her on royal canin, some digest formula. What do you think?