I have never fed Blue Buffalo, but have been on the verge of trying it several times. I know that the PetSmarts in my area sell some of the so-called high quality foods. (I know ours carries Innova and Wellness, not sure what other brands off the top of my head.)
There is a sticky at the top of this section that lists companies you can get samples from. I also suggest you try this link that will direct you to many many sites and opinions with information about foods on it.
http://www.consumersearch.com/www/fa...d/reviews.html