Older hens start accumulating fat below the vent, creating a shelf effect which prevents the poop from shooting clear of the feathers. I have a handful of retired hens in this category.
In spite of snow and below freezing temps, they get regular butt baths to avoid the skin inflammation accumulated poop can cause. The procedure is relatively simple.
A warm basin of water, some baby shampoo and a hair conditioner are the supplies you will need. Some hand towels to pat dry the feathers, then a blow dryer to finish drying the hen are also necessary.
I back the hen up to the basin of water. Squirt a dab of shampoo onto the crust after splashing some water on the crust to soften it. Work the shampoo into the dried poop until it loosens, pulling it off the feathers. Rinse well. Then massage some conditioner into the wet feathers and rinse again. I've only recently discovered that the hair conditioner helps to restore feather quality after the shampoo removes critical oils.
Then pat dry and blow dry until the butt is nice and fluffy. Good as new and ready to go back outdoors into the cruel, frozen winter.
