science diet food is no better then the purina ingredient wise. Most people here feed wellness, solid gold, canidae, chicken soup, innova or nature's variety. THese foods cannot be found in a petco or petsmart, and definitely not in a supermarket.
i know boxers have huge skin issues so if he's not having any problems with the purina then keep him on it. As for your yorkie pup, i'd give her a better option.
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