Yeah I used to breed Rats and ASF for my Ball Pythons. A lot of people with moderate collections will often try it, and a lot of people find that it's not worth the time and energy. Breeding rodents can be a lot more involved than ball python breeding. I was supplying a few other people too and basically my feeders were costing me nothing - but took up about 20 hours a week to maintain. I worked it out and I was paying myself about $3.00 an hour. It's easier for me to just order in bulk and not think about the rats, or have to deal with the escapes.