Its too expensive for me. I used to use the Venison and Rice until the poison (melamine) scare last year. Natural balance made a deadly mistake while trying to cut costs. While trying to add new ingredients that artificially made the protein % appear higher they suspected they had poisoned some dogs. They made an immediate recall of all food contaminated, and reformulated several of their foods.
They are safe, but you can buy better foods for less money. Unless you “NEED” a single source protein food for a dog with allergies- I would find something else.
I switched to Cadidae All Life Stages. It too has been recently reformulated, but it is still a real good food for about $1.25 per pound in a large bag.
If you really want to look at how many foods stack up, try this site-

http://www.dogfoodanalysis.com/dog_food_…

I’ve kept Natural Balance Roll in a sealed zip-lock in the fridge for a month with no problem. It also freezes very well. Sometimes I buy the big roll, use 1/3 & freeze the rest in 1/3 parts. I’ve kept it in the freezer for 2-3 months.

I feed them as treats or a supplement to my dogs’ dry food and they go nuts for them.I bought a large roll and I’ve had it in the fridge for about 3 weeks and it still smells fine and the dogs eat it like it’s fresh meat. It is actually something that they would fight over if I didn’t feed them separately.