My 2 boys get neutured tomorrow

It could take several weeks for their hormones to calm down. They should become easier to littertrain, less hormonal (no more humping and spraying), and less territorial. Many male rabbits act as if they didn't have surgery and will want to run around and play the same day as surgery. I would keep them confined for about a day; and if they feel ok, they can come out for short periods the next day.