My hen which is about 5-6 years old is gasping for air. This has been going on for a few days and was bad in the morning and cleared with warmer temperature, but now is all day. It is around freezing temperature now. She is not eating or drinking at all and has bad breath. Her crop is empty. I looked down her throat and put a q tip down with nothing there. I have given her some syringes with water and vitamins.