I don't mean to bash the people who use Doggy Bag and have success with it, but that stuff is junk. You will spend an equal amount on good quality rodent block as the Doggy Bag from what they waste. On the rodent block, they will eat less, look and smell better.
An acquaintance was feeding her rats dog food. Her rats smelled to high heaven, had poor body tone, and were notorious cannibals. I am not sure why they cannibalize on the dog food.
My rats hated the Doggy Bag and I could barely get rid of the one bag I got.