This morning my chicken was totally fine then about two hours later she was limping on her left leg I didn’t think anything of it I didn’t see any obvious injuries so I figured maybe she just hurt it somehow and I was going to give it a few days then about three hours after that I looked over at her and some thick slimy stuff came out of her beak she is eating and pecking at the ground and drinking but I am still so worried that this is a Disease please help!! She is a bird with a weak respiratory system and pick her up she will do a little wheezing and has always done that and I was told she just had a weak respiratory system or a defect.