I have recently rescued an adult muscovy duck ( Travis) who has been kept in a small cage all his life with no water to wash in. I put travis on my pond with the other ducks but he doesn't seem to know how to swim, he just flaps his wings across the water until he's at the shore. More recently i have noticed that he is getting increasing dirty, his gland near his tail is bright orange and i have never seen him groom himself which i find odd. Today when i went to feed the ducks Travis was hunched in a corner outside the duck house looking very unwell and shivering and as picked him up he was soaking wet (it was raining quite badly last night but sunny today so should have dried) I have set up an area indoors for him and towel dried him as he is just so cold and wet, but im not sure what to do with him from here. I don't want to put him outside incase it rains and he becomes worse. I also worry that because he isn't cleaning himself he isn't waterproof?? I'm not sure from what age he was put in a cage, it may have been from hatching so maybe his mother never taught him. Please help!