i only neuter when absolutely nescessary. I dont believe in preventive neutering. I have 8 boys and theyre all perfectly happy, no need to cut those balls off so why do it
And i like their attitudes! dont want them to change so they get "easier".
Ive had neuters though, when they get aggressive and hormonal and cant get along with their buddies (or start biting people) then yes to neutering. But neuter so they can live together with girls? no not for me...
Resques here use it for stressed out scared rats too and sometimes it does make a difference. Not always though. My boy Macho was neutered and still terrified of people (or other rats, he was afraid of his own shadow) but he learned other rats are ok and by time he didnt find me that scary anymore either (but it took a lot of time and patience, not just a neutering)
And it doesnt mean nothing happens when neutered, i once had a little babyrat (6 weeks old) who was attacked by a neuter and he killed him, not by accident, it was murder, he wouldnt let go...something just snapped, he never was agressive before...
btw spaying is getting more common here too, nowadays the do a spay if they have surgery for something else, theyre in surgery anyway so do it all at once. I even know someone who spays all her girls, just in case. I dont have girls so i dont have to worry about that