I feed canidea platinum to my 2 dogs. A 35lb bag lasts about 3-4 weeks. That is a bit hard to find sometimes so sometimes I get the nutro natural choice for large breeds which comes in like 40 or 44 lb bags, that lasts about a week longer than the canidea.

Both dogs are large (68-85 lbs)

I store them in airtight containers and I have never had a dog get turn up their nose to it.