Probably hormonal. Have had this happen twice, both times it was the same RP tom. One year hen allowed him to `share' for about half a month (he gave up), the following year the hen had to start another nest as he just appropriated her first one. Sat on one egg for about a month and a half. Same broody hen sort of schedule, i.e., out briefly to eat, drink, poop and dirt bathe every couple of days. Totally ignored other toms when he was out.
thankyou. sometimes i feel im too old to start this again. i dont remember so much.and its hard to outdistance the guard ducks in a foot race.i even have one rooster thet attacks me every time i go in the pen but he is still too small for the fry pan