TOTW is one of the top brands of pet food. Allergies were the exact reasons why I've had to do quite a bit of dog food research. My first Aussie was allergic to just about everything, food and airborne allergens. Thank goodness we were able to finally manage his allergies with a variety of things, food being a major one.
There are a couple of sites out there that provide very good information about what's in dog food. Here's one that I refer to quite a bit (as do some trainers and breeders that I know):
http://www.dogfoodanalysis.com/
The thing that worries me most about Nutro is that it's manufactured by Diamond.
Diamond was the one that produced all those various pet foods recalled last year. Caused several deaths. Diamond also had other recalls and I just don't like the trend.
Recently, Canidae announced that they switched to Diamond, and I made the decision to switch away from Canidae just because I don't trust Diamond based on their history.
Now I feed Orijen kibble and they are doing great. Sorry to be a bit, uh, blunt, but I can see and smell a difference in their stools. All for the good. I still supplement with raw in half their meals. And will soon start buying Nature's Variety raw frozen to fill in when I don't have time to grind.