Gave hen and rooster penicillin shot, they are so sick with running nose, hens eyes swollen, I read fowl pox lowers immune system and can cause the repertory infection, my question is how often should I give the antibiotic shot? Also gave them warm bath in Epson salt and rx for resperatory. Half as prin for fever. Any advice appreciated as I am new at this and sure do not want to lose them.