Once you have selected a good quality dog food, that should be all you need right? Not really. You should vary your dog’s food occasionally. There are good reasons for this. Dogs are designed to consume different foods, and to obtain differing vitamins and minerals from each. They are not designed to eat “only chicken” or “only lamb” or any other food item for eternity. Changing foods, importantly the contents of those foods, every so often helps to give them the variety their bodies were designed to prosper on.
There is no one dog food in existence that “has it all”. And remember, the feeding trials that foods go through only last for six months. Changing foods periodically helps to ensure that no dietary deficiencies or excesses build up over time.
Variety is the spice of life. Who wants to eat the same food day in and day out? Feeding your dog something different helps to ensure that he does not become bored and frustrated with his food.