We have a 6 year old+ mallard female that is gasping for breath. Her chest is working heavily and her mouth is open, she is really working to breath. This started yesterday afternoon. We've looked and felt for obstructions, squirted water in her throat.... We can't figure out what is wrong with her... except a possible injury from a male duck or bossy male geese (the momma goose has 4 new ducklings and all are protective of them. They all have separate housing at night but have a joint yard that is about 40 foot by 40 foot. She has had the condition for for over 24 hours now.... Can still bite when we examine her. Any ideas or suggestions on a treatment? or just put her down because there isn't much treatment options?