I see that many people use Fromm's here on EBN. I was just wondering if anyone out there fed their guys/girls Merrick Grain Free. Goob LOVES it and is doing really well on it but I just wanted to know if the flavors were interchangeable and if so, how interchangeable? Meal to meal or day to day? He has no allergies but just curious b/c one day he might decide he doesn't like this flavor anymore.

