How do you guys feed them? Do you just give them a certain amount per day or you constantly refill their food?

I see a lot of food inside the tub as if they were their bedding. Are they just chewing it out of boredom or are they laying food for the pups? Or they want more bedding? I'm using pine pellets.

It doesn't seem like a 50 lb. bag of mazuri will last a month for 13 asfs. I constantly refill their food thinking that if they don't munch on the blocks they will munch on the pups.