Do a google search for "Nutro sick dogs" and you will pull up lots of info. Not only have they had to recall a ton of food in the past, there have been many reports of this food making dogs very sick.
Here are links to FDA's website for recalls of Nutro brand foods:
We're Sorry! Browse Pet Food Recalls - Dog - Nutro Max
I don't know if you saw the post I posted earlier today about the recent pet food recalls by Mars which is Nutro's parent company... Although Nutro is not involved in the most recent recalls, I would not take any risks...They have a lot of quality control issues, in my opinion...
August 2008 — Mars Petcare Recalls Pedigree, Nutro Suspected » SecurePet Pet Sitter, Wimberley, Texas "This company also makes Nutro pet food which has recently been blamed by consumers for a nationwide outbreak of illnesses—and deaths— of dogs and cats. However, Nutro products are not part of this recall."
Also, do a search for Purina recalls. They've had recalls too...
Aside from the recalls, Purina uses by-products. Google search by-products in pet foods, and you'll see why it's disgusting.