Have a couple of questions for you ...have the three chickens been together long? Was the rooster part of a larger group of hens before you got him?..sometimes it takes a new rooster time to "take over" a new hen (if the rock hen has not been with him in past) maybe dominate is a better word to use. Also, if the rooster came from a larger group of hens and now has only two to look after, he has too much time to focuse on the polish hen?....what do you think??