G Freden wrote:Thank you Jay, I would never have considered just crating that jerk drake overnight, but maybe that would be the best option.
No "trick" works every time. This just seems like an easy test to do. If it seems to help at night, you could try crating as a "time out" for 5-10 minutes if you catch the drake chasing the newbies during the day also.
Some ducks "mate for life". If your Drake has that tendency, he may just be doing what his hormones are telling him to do. Or if he also is an incubator bird, he may not know the subtleties of, "Hey, baby, I'd like to get to know you" behavior and be frightening the young girls.
Above all, I would try observing what seems to trigger the chase and how the birds are reacting on a day by day basis to see if things are moving in the right direction. I agree it would be wonderful to end up with a single, happy flock!