i do not remove spir from the giant roo i have from davis lines,,,,,,, father to all , last year he did a number to a few hens back ,,,i think in a ideal world ypu can let the roo go in with the girsl 24-7 but its best to have 6 to 8 hens per roo , we had to blue coat some of the hens back. so if u want to breed hens of a certian lineage throwing them in willy nilly with a large number is ok but dont leave the roo aloan with one or two hens unless its only to do the deed than take them out of the cage,i hear alot of good things about the sadle for hens but i would be afraid the hens might get caught on the roost we put in ( our wheatens love to climb )