I have 4 golden sex links that have grown up together since chicks. They are 1 year 3 months old now. One had been hanging out in the nesting box for a couple days and would get out when I would force her out as we don’t have a rooster and are not attempting to hatch eggs. She makes a continuous chuffing noise and makes her feathers/neck feathers stand up when approached but allows me to pet her ect. I took her out of there and placed her in a dog kennel with food and water, today is day two of this. The other three chickens attack her if she is out in the open. She appears to be eating and drinking fine. Droppings look normal. Her comb does have some scabs on it. She doesn’t appear to have any respiratory symptoms. Could this be broody behavior or some illness?