Well it seems that my other chickens already got sick and are recovering from whatever Spaghetti has. During the weekend Godzilla had a really swollen face and nasal discharge, I thought some bug bit/stung her because it happened in a few hour on Sunday night. She was fine when I left for work, her face looked like a chipmunk when I came back about 5-6 hours later.
Today I finally went to check on my chickens since it was raining all day, and rusty has the right side of her lower jaw and face kinda swollen, and she had a runny nose yesterday. Also about 3-4 weeks ago Rusty also had problems breathing, she was gasping for air and made swallowing movements, as well as sneezing/coughing. I thought she had gameworms so I dewormed everybody, and she got well about two days after I started the treatment.
I also noticed my cockerel Roostroyer had a runny nose and a bit of a rattling breathing, but it was very light, and it went away after a few days. Now I'm thinking that a virus has been circulating among my flock, and it hit Spaghetti the hardest since she wasn't in a great shape when we got her almost two months ago, and she's been slowly recovering from overmating wounds, loss of feathers, and apparently poor diet because her poop was nasty. I haven't been able to make her eat at all yet, just drink a bit of water, so I'll try to force feed her tomorrow and just giver her some apple juice right now, and let her sleep.