hi! can anyone advise me. i have 11 lovely lady rats living in one enormouse cage. nothing against the boys i just want to keep the one cage, problem is ,there is a beautiful male dumbo rat living in the local pet shop, he's been there about 3 weeks and is approx 3 months old and iv'e fell in love with him. nobody seems to want him and if he is sold i fear he will live his life out alone. i go in the shop about 4 times a week to cuddle him, his is sweet and tame and i really want him. now i need advice! i am considering buying him and having him castrated so he can live with my girls. i would introduce him after his op as i would any newcomer, slowly over a period of time, i have spare cages for such things. does anyone have any idea how long he would remain fertile after his op. does any one have an opinion on this matter. is it viable and is it moral. please help