Thanks RDB911 for the link!!
I haven't ever heard of PRISM before, but I took a look at the ingredients and would definitely not recommend it.
The the growth, adult and performance formulas all have Chicken By-Product Meal as the first ingredient.
They also use corn as one of the main ingredients...and while corn is not inherently bad if your dog is not allergic, it shouldn't be one of the main ingredients. IMO