I have a hen who has been gulping air. This has been going on for months. At first i thought maybe I'd walked in on her straining to lay an egg but she does it constantly now. No other symptoms. No discharge, no odor, no swelling or discolored skin or feces, no diarrhea, inside of mouth is normal. She's eating and drinking regularly. Egg production is sporadic. They're kept indoors on shavings. All other birds are behaving normally. I want to have her tested through avian biotech but I'm not sure what to test for and I don't have the money atm to test for everything. My options are as follows: Bacterial tests - Bordetella, Chlamydia, Pseudomonus Fungal tests - Aspergillosis I'm thinking I should start with Aspergillosis because I did have an issue with leaking water tubes around the same time i noticed the labored breathing. The tests are $25 each and I'll have the money for all 4 in about a month but id rather test for 1 or 2 now. Thoughts? Suggestions?