I just picked up 3 chickens from someone who had a cat attack in their urban coop and wanted her girls to go to somewhere more rural for their safety. The one was killed yesterday. I brought the three survivors home and one of them has this big bump at the base of her beak near her eye. I am wondering if sinusitis could occur in one side only, or could this be a result of the cat attck, or something totally different??? I am sending a SOS to you experts. When I opened her beak it seemed a bit "bubbly" for lack of a more medical term and her breathing sounds a wee bit raspy, but I could also be paranoid.... I have injectable Baytril and tetracycline, and duralactin (?) on hand.