I have a pekin drake whom we added to the flock about 5 months ago to give our mallard hen some company. Now I know he’s getting close to being sexually mature and I’ve been watching him for signs of trying to mate but he hasn’t really? Other than this problem. I bring them in for a bath every night and he’s begun to grab onto my mallard hen’s leg hard and not let go. She tries to swim away but he grabs her by the leg and won’t let go until I get him off of her. This is my first time owning a drake, I don’t know if this is normal drake behavior but I don’t want my mallard to get hurt. She is so much smaller than him... and he only seems to do this when I have them together in the bath. I’ve never seen him be aggressive towards her outside in the chicken run.