and how much time do you give? I know it's a crazy question but Brodie is NOW on the same food as Lola which is an all life stage food "taste of the wild". We have had Lola on this since day 1. We had Brodie on Merrick Puppy Plate but he constantly had bad . So over the course of the last 7 days we have converted him to "taste of the wild". NOW he has tear stains and so does Lola - she's never had a problem before. Is that food or something else? How do you know if you made the right decision on food and how long should you give it before you change it AGAIN? Sorry for the stupid question and thanks!!