dont' know what to tell you about those brands except read the labels on the ingredients. Make sure there is no corn, no wheat or soy and no by-products. Any time you switch to a different food, you will also want to go very slowly...like a week to 10 days for the transition as you gradually mix in the new food with the old food. This will help prevent tummy upset.
Good luck! If you would like to try the Life's Abundance, i have free samples.
