I have a 1300 gram Fire male that has 6 girls this year, have him on a 4 days on 3 days off routine and give him 7 days off once he completes a rotation. If there is no interest after 2 days, then he moves on. I've found that the longer break turns him into a breeding machine, and as time goes on his interest starts to wane. He has also gained almost 200 grams over the breeding season, so with his older age, larger size and the fact that he is pounding food like he is building follicles; I have no issue keeping him in rotation with 6 females, but this is with careful oversight and monitering his behavior and condition. I do NOT reccommend that someone try this with a less mature, smaller male. My smaller yearling males have 1 pairing each and they are in the 600 gram range.