Bella (1 year) has been on Canidae ALS since she was a pup and the breeder said to keep her on it. Because of bad gas, skin bumps and flaky coat, I've decided to switch her to a grain free kibble to see if that improves her problems. I would like to know which one is best. I was going to switch to Canidae's grain free food but the sales person said Natural Balance is better. I just got a small bag of Sweet Potatoe & Fish to transition her over. She loves it but before I make a complete switch, I'd like to get some recomendations.