ASF make great feeders for colubrids as well. I also feed them to my Hogg Island Boa. Mine are all calm and don't bite. I use chew-proof water bottles and have wheels in all the tanks. The MAIN reason I breed them though is that my wife if literally DEATHLY allergic to normal rats. I have the ER bill to prove it just from going into the local pet store on cleaning day for 10 minutes. I like them but if I could I'd go with normal rats just for the size issue. I have to feed 3-4 ASFs to my adult breeder balls at a time. However, my snakes feed on these like CRACK!!! Even the corns and carpets seem to like them better!!!