check the whole back/hip/leg/foot areas including joints, for any heat or swelling to check for injury..
she might have jumped or banged herself..
feel for possible hip joint injury..
wouldn't hurt to recheck the bottoms of feet and between toes.
look close for splinters..
check legs for raised scales or crust.
have hen on soft bedding with food and water close by.
a little plain yogurt and cooked egg yolk wouldn't hurt along with vitamins.
describe droppings..color and consistency..
if you think she has an injury, you can make a hammock..some people use face masks, or bandanna..so she can rest the leg at least a little during the day.
make sure she can reach food and water, and the vent is clear.
a little aspirin might help if there is swelling..
1 (1mg) aspirin crushed into 1 quart of water.
hope then gets better.