Back when my oldest dog was eating kibble I switched to a new food with a new protein source at the end of every bag (for him this was about every 3 weeks). I know many that rotate this way and others that feed one food for several months and then switch. I currently feed all three of my dogs a homemade diet and they get something completely different at every meal. I would say that as long as you’re switching at least every 6 months you should be fine. Just to warn you though – the first few times you switch you’ll probably need to do slow transition and you may see some loose stools. This is normal for dogs that aren’t used to switching foods – the probiotics and pumpkin that I mentioned before will help with this. Once your dog is used to switching her digestive tract will become more resilient and you should be able to switch cold turkey with no transition.
