Switching food advice Dog Food Advisor › Forums › Canine Nutrition › Switching food advice Viewing 2 posts - 1 through 2 (of 2 total) Author Posts March 5, 2017 at 10:30 pm #95738 Report Abuse Kevin UMember Hey guys, I’m switching my German Shepherd’s food from Blue Buffalo Life Protection Formula Puppy to Orijen Large Puppy. I just want to know how can I do it? How much of Blue Buffalo and Orijen should I mix? March 6, 2017 at 5:16 am #95747 Report Abuse InkedMarieMember I would do 1/4 new food to 3/4 old food fo a few days; if it goes well, do half & half etc. If your dog has a sensitive tummy (that you know of), do less of the old food. Either way, take 5-7 days to transition. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic.