I have a crossbreed buff orpington hen who caught my attention today because she looked weak in the eyes. Her tail feathers are drooping. When I picked her up, her abdomen is quite swollen, but not hard, not squishy either, and HOT! She is still picking at food. My husband has been caring for the chickens for a couple of weeks while I was out of town. He hasn't given them any grit. Could this be part of the problem? Should I start her on terramycin? Any and all help will be DEEPLY appreciated. Thanks soooooo much.