We breed both ASF and rats, I even forgot to close a lid on an asfs bin and he was just sitting on the lid when I got home didn't go anywhere, the only problem we have had with breeding asf in colonies is one situation where some of the older hoppers killed the next litter of pinkies. You need to make sure you're weaning them out before that happens but not too soon so they die. We sex the weanlings and put them in with the grow up adults which seems to work really well they all get along and don't pick on the smaller ones, as long as there is enough food and water. Breeding in colonies can be tricky because once a colony is set they will kill any other rat introduced, so we start up new colonies as smalls. ASFs do love to chew so we give them sticks and wood (after freezing it for a few days) and they end up making their own tunnels and nests in the logs, keeps them busy and from destroying the bins. We use bins not tanks, easier to clean and stack. We rarely feed the asfs to our bps, we prefer to have them all on rats but we have one female we will never sell who is an asf only eater and alot of hatchlings we'll use asfs if they refuse rats just to get them to eat something rather than nothing before switching them to rats. Breeding ASFs and rats can be expensive and ASFs take a long time to grow to size, females will grow faster if breeding some will be maxed out at a smaller size without breeding.