Changin your dogs food all the time is not always a good idea. Dog’s intestinal tracks are different from ours. Changing foods often causes them distress and might lead to cases of diareha. We had a dog with some health problems and had to change foods several times. Our vet warned us to start adding the new food gradualy a little at a time like over three or four days. Adding a little more of the new food each time. Iif we added the new tow fast she had tummy problems. This might not be true for all breeds, but it was for ours.