I came home to my male Mallard in the coop alone. This is very odd because he ALWAYS follows my pair of indian runners. I have 1 rooster, 10 hens, a male and female indian runner and 1 male mallard. When i walked into the coop, a couple hens came in and immediately ran to him and pecked at his backside. I removed them from the coop and picked him up. That's when i noticed his penis was out and pulsating up and down; almost as if he was trying to retract it, but he couldn't. I set him down and it was doing the same for about 5 minutes. I took him out to the duck pool thinking something was blocking and swooshed his backside around in the water....that didn't help. what should i do??