I got a khaki Campbell duckling yesterday and he/she is already very attached. The only problem is I got one duckling because I'm not allowed to have more and I need to go to work and school but he gets very upset if I'm out of sight and I don't know what I can do to make him less stressed and less noisy when he is alone or in his pen. I try playing a recording of my voice and a teddy bear for cuddling but I don't know what else I can do!