Our 1 1/2 year old lab is high-energy, works out at least 30 minutes a.m. and 1 hour in the evening, 7 days per week. We are feeding lamb&brown rice, 4 cups kibble + 1 canned. She is 68 lbs., long and lean. Has anyone else purchased this dog food and, if so, what is your experience with quantity. Thanks! Bestlabever