I have 1 Buff O cockerel with 11 ladies, and I've only seen him actually tread 1 of them once! And I've had him since Oct!
He does like to chase them but only in the morning when he's feeling amorous. Not sure if he will feel the need to sort them all out when springtime comes along. Or indeed if he'll manage, or if he'll die trying.
I think with as many as 50 hens you probably have the option to get another cockerel or 2 and there should be enough ladies to keep everyone happy. But if personalities clash I suppose the boys will fight no matter how many ladies they have
Well unless you want fertile eggs you don't need a cockerel at all
Well it's not always about 'need' though, Hughesy
And some people like to have a cockerel to keep the women in order!