Is oxbow the only food and hay company that is really considered 'exceptional'? I live in northern Illinois, and, as you can probably imagine, shipping charges from Nebraska is very expensive. I can't affor it. I'm going to move my piggie off of his old food, as it had seeds and treats in it, but what food do you suggest, especially if you are near Chicago? Are there any exceptional brands out there? And also, when I do change their diet, should I introduce him to the food slowly? What should I do?