I was using 8 in 1 for rat food until my colony grew so big that it has become uneconomical to feed them this way due to the high cost. I just returned from the only two feed stores in my county and they both said no go on the rodent block. They actually looked at me like I was a nutt because everyone here wants to kill rats not feed them. Anyway, I picked up a bag of doggie bag food which comes to like .40 per pound and does not fall through my rack like most dog food. Is this really bad to feed my feeders or what because ordering food online is kind of pricey as well seeing that shipping costs more than the product!