TY-had him seperated yesterday afternoon and released him b4 dark(so I could, in theory, round up him/duck at dark) and they both took off and could NOT find them after dark. I was going out until 11pm calling,looking and no response. so I said some prayers and went to bed and this a.m. they came running from behind a bush(probably there all along, close to house)and he started his chasing of chick hens again. Managed to catch HIM(I hate animals sometimes!!!) but the WH girl was taking off for the food by chicken pen. Anyhoo- will NOT release him tonight and will just have my son help cowboy up the duck. The drake is a Call and very small so I can't imagin him actually hurting the chickens(he hasn't caught one so far and the cockerel/roo are at least chasing him off when he gets close) but will just keep ducks penned for a few weeks until ,hopefully, mating behaviors calm down. Its funny how he seems to only approach the BA pullets, possibly because they are young and he hasn't been discouraged by THEM(1 of the older hens kicked his butt) or maybe he thinks they're more attractive than the other girls(LOL).And I got him in the fall because the poor WH duck was alone and VERY distraught for weeks. They mate reguarly in their 2' deep pool and I thought all was well until 2 days ago. I MAY try to find an unwanted adult duck(JUST 1) and I have to remember that food costs go down slightly when grasses/bugs start to appear.