I just acquired an 8 year old male Pekin duck from my dad last night. (He's moving and can't take the duck with him) I have only had chickens so I'm not sure about raising a duck? I put the duck in the largest coop/run that houses a mixed flock of female hens. (I thought if I put him in with the roosters, they would kill him) And watched them for a while. He went in wagging his tail and looking around. My girls looked confused but all right with him being there. They all ate together, and he found the waterer just fine. I checked on them again in the morning and everything was fine. He was in the covered outside run walking around making grunting noises, with the chickens around him, and everyone was just hanging out. Then I checked on them again in the evening and he wasn't inside the coop with everyone else. He was still in the outside run shivering and dragging his beak around the ground. I was guessing he couldn't figure out how to get back into the coop, so I picked him up and put him into the coop myself. As soon as I put him down his head just dropped. He wouldn't walk until I start to pick him up, and then he will only walk for a second or two then he sits and drags his beak around the ground making a clicking noise opening and closing his beak just a little each time. I am so confused, is this normal duck behavior? Maybe he's homesick? Or is he really sick? I don't feel comfortable leaving him outside for the night, so I brought him inside to the bathroom. I thought maybe a swim would perk him up, so I filled the bath with warm water. He walked around a little and then went back to pecking water almost burying his entire head underwater. He would perk up for a minute or 2 then go back to just sitting with his head in the water, blowing bubbles out his nostrils. When I got him out I dried him off and gave him some Nutri-drynch. He's not eating, and not really drinking. (When he sticks his face in the water he doesn't tip his head back to swallow, so I don't think he's actually drinking) He has only pooped twice in 5 hours! Both times you can hear a loud fart sound and then diarrhea. His 1st stool was very light green and the 2nd one is black with a little white. (Sorry for the detail but I don't want to leave anything out) I have searched all over the internet and can't seem to find what to do, or what he could have? Any ideas would be greatly appreciated!