Duckfarmer1
Crowing
Is this contagious?MG or coryza could kill her, but most of the time the survival rate is good even without treatment. They may be less likely to thrive and lay eggs, and they can get sick again after times of stress. Some people strictly cull sick chickens. A vet would probably offer an antibiotic if they felt it was a bacterial infection such as MG or coryza. Tylosin (Tylan) is one of the common antibiotics they prescribe. If you cannot see a vet, I would order tylosin here:
https://www.jedds.com/shop/tylan-soluble-100-g/
Dosage is 1 tsp (5grams) per gallon of water for 5 days. Only treat sick birds.
Chickens with a respiratory disease need to be kept warm, since they have trouble regulating body temperature. Do you smell a bad odor from her face? Coryza is said to smell bad. If you see a lot of pus inside her eye, it should be removed, and sometimes squeezing is necessary.
Clean her eye twice a day, and you can use saline eye wash and apply some Terramycin eye ointment or plain Neosporin or Triple Antibiotic Ointment after.