They recommend changing slowly, because they also recommend picking a food and staying on it for life. Think about it, how stupid is that?!? It limits the probiotics in the gut to only the ones that that particular food can support and a huge part of the immune system is in the gut, directly attributed to the diversity of probiotics. By staying on one food, you create an unhealthy dog. Is there any food that is the only single food a human needs? no, because no food is perfect. Well dog food manufactures are not godlike in their ability to make dog food, so no dog food is perfect either. Just like variety is best for us, variety is best for dogs too. Once a dog is used to switching, they don’t need any time at all to switch, one day one food, the next day the next food. Some dogs that aren’t used to switching take a lot longer than 1 week to switch foods, because their gut is that unhealthy.
