I just picked up some breeding stock mice and rats. Just a small colonie each to see if I can reduce costs a bit. I have read you do not want to give them a food hopper or dish that they can crawl on so they dont poop on their food. Well I am keeping them in old aquariums for now and have not come up with a solution to prevent this. Does anyone have suggestions or thoughts on this? Or is anyone of the opinion that just a food dish is ok?