Two years ago I had a very sick peahen that probably would not have survived the 90 minute trip to the avian vet, so I packed her up and took her to my cat/dog vet.
I did not call first because I thought they might say "we don't treat fowl". I walked in and explained she was in my car and that I really wanted the doctor to look at her and her poop.
They agreed, so I brought her in. He said that he didn't know much about fowl, and probably would really be able to do much for her, but what he knew about cats, dogs, and fecals did save my hen.
Well worth the $65 office call.