My issue was more Apollo likes to wrestle with Yuki and I dont want them tearing stitches ... When Apollo wants to play he doesnt take no for an answer he bounces around and will even push Yuki out of the hammock. Will Apollo sense that he has to be gentle with Yuki?
And If I remember correctly even though after a week he will not have the urge to mount anything I still should not introduce him to the girls for 3 weeks correct?
Rats are pretty good at sensing when their friend is sick or not well, so see how Apollo acts first, and if he continually bugs Yuki, then remove him for the night so he can sleep off the effects of the anesthetic. He most likely will get a pain injection after the surgery that will take away the discomfort. Watch for twisting and owwie stretches, and pressing his belly down on the ground, excessive licking, etc...he will need pain meds by then.
Yes 2.5-3 weeks is about the right amount of time to guarantee infertility. I start my intro's at 2.5 weeks post-neuter.