danisgoat
Moderator
I was reading in a new dog magazine I got and it suggested switching off to another protein source after you finish a bag. The author likened it to us giving a child the same thing over and over. Makes alot of sense.
This is what I do....I switch between three different varities of the same brand of dog food, so that the protein is altered. I always mix in the old, so that it is gradual, but this way the dogs have all the enzymes they need to digest a variety of protein sources.