How to treat an swollen face of a chicken?

[Chicksgowild]

I've got 3 chickens who seem to have gotten into a fight. One of them has a swollen face on one side (looks like she is smiling), the 2nd has its face swollen and inside her mouth there is something (pics. 6 - 8) that concerns me, the 3rd has its foot swollen. How can I treat it? Pics down below

 

[Eggcessive]

Are they getting outside to roam around? Is there any overcrowding? What do you feed them? Do they have shade in the heat? It is hard to know if this is all due to fighting or possibly some of it is due to a respiratory disease. I would flush the eyes with saline or eye wash and get some Terramycin eye ointment to put a small dot into the eyes twice a day. Tylosin is an antibiotic that will treat MG, a respiratory disease.