I'm fairly new to chickens. Got some day old Buff Orpington's last July. The other night one of them started making a noise that sounds like a cross between a bark and a frog croaking. Yesterday she was doing it again. It's fairly often and pretty loud. Now when she does it she lifts her head and opens her beak and leaves it open a few seconds. She's foraging and eating chicken food and other than this she seems ok. I did go ahead and give them all Ivermectin yesterday as they had never been wormed. I guess I wanted to do something and it was the only thing I could think of. Anyone have any idea what could be the matter with her? Thanks in advance Elizabeth in Va.