On Saturday, my neighbor came over and asked if I wanted a duckling that he had. It was the last one left after he lost the others to various accidents and he said that he thought the duckling was lonely and had quit eating. I have chickens who are 8 weeks old and thought the duck, who is about 16 weeks could hang around the chickens which would be better than being alone. When I walked over to get him, he was in very bad condition and skin and bones. He was shaking and walked like he was drunk, no energy and staggering. There was no fresh water, just a kiddie pool that was full of green slime and some cracked corn in the dirt for him to eat. We took him over to my place where I put him in fresh water which seemed to perk him up and we wanted to see if he would take an interest in the chickens which he did not. We also tried to feed him and he wouldn't eat anything. In the end, I was worried that he was sick rather than just not eating because of loneliness and didn't take him for fear that he would make my chickens sick. He would have had to been kept in the coop with them because I didn't have a quarantine area and that was too close for comfort for me. My question is, do the symptons sound like a common illness and what would that be? Like I said, he is twice the age of my chickens but weighs less than my smallest chicken which is an 8 week old leghorn. He's also about the same height. I don't know much about ducks but it seems like he should be quite a bit bigger. I did tell the neighbor that the duck needs fresh water all the time, which he did do but the duck hasn't gotten any better since Saturday. Any advise would be much appreciated. The owner also didn't seem inclined to take him to a vet.