my neutered boys do not mark the house and all my boys with the exception of Radar squat LOL Radar marks all the time even when there isn't a bitch in season but less often. I have a female that is spayed and she marks all the time too but at least it's on the pee pads when she does LOL...
I love my boys but like Mary said much more into studding or going out to stud than just either or....so much more into breeding than that
Donna