Mice chewing up Food?

I have a small trio of mice. They are being bred to feed my snakes, but i have a problem, they keep chewing up all their food, they couldn't have possibly eaten all the food by 2 days and i think their just chewing it up, i gave them sticks to chew on, which most breeders don't, its the little rodent blocks that im feeding them, anyone have this problem how did you fix it, they have a dish for food, because i didn't built a rack yet, and don't plan on to anytime soon.

Thanks

what if i didn't put food in a bowl and just put it in the container instead?