I've had a shi tzu for almost 6 months now (our neighbors gave her to us, they raise dogs & the puppies agrivated her) She's four. What is the best dog food. I've heard pros and cons for almost all brands. Can anyone tell me whats best and why. I've been reluctant to take her off what she's on (I heard you shouldn't switch around) She's on Kibbles and Bits now. All I know is that it isn't cheap but that doesn't always mean It's more healthy. Any ideas or facts would be great thanks :y_the_best: .