We have a 10-12 year old chocolate lab that started getting ear infections in the last two years. We had been using Science Diet, but moved Taste of the Wild from TSC. It's supposed to be grain free, and the vet thought it might help.
I can't remember what it costs, but it's only a bit more than the Science Diet we had been using.
The dog loves it. I can't work with her in the garage anymore because she spends the entire time wanting to get into the food container. It drives me nuts. We give her 2 cups in the morning and 2 at night, but I swear she'd eat a bag in the morning, one for lunch, and 2 for dinner.
Looks like Blue Buffalo is available at TSC, too. We just bought a bag, so I'll have to try and remember for next time.