I love the idea of switching btwn foods and think variety is great for overall nutrition. It keeps the dog excited about food, can prevent acquired allergies, and provides different sources of nutrition.
I like Solid Gold's Barking At The Moon even better than Wee Bits - so that's another option w/in the same brand. I also like Innova Red Meat Small Bites (or the chicken), Orijen, Wellness CORE, and Natures Variety Instinct (not the rabbit).