Two jills and a CASTRATED hob will live happily together ,it's a traditional combination, but he will not do the business to bring the jills out of season .
For this you have three option Jill Jab, Spaying the jills and a VASECTOMISED hob . The Vas hob is imo the best option but he may be so keen that he will never leave the jills alone ,so you might have to house him seperately until he comes out of season even then it's a matter of trial and error as he might still rag the jills .
ATB