How deep for the water therapy? What will she do in the water? Just lift her legs? How wet can chickens get? Can you tell I am new chicken momma?
		
		
	 
Good questions.
Water depth ? Ulp to mid crop.  I would use the sink and fill it up so the water is at mid crop.
Support her with your right hand, by putting your hand between her legs from the rear and holding her body. Your left hand can be on top of her back to steady her also. Lift her up with your right hand about three inches and her legs will hopefully move. Altho, some just let their legs hang.
In that case I would use two hands and hold her on her sides with hands on the wings so they can't flap. Lift her up and down, forward and backward and see if she will stand..
 
 What will she do in the water?  Hopefully, try and walk. If not just move her legs by pushing them against the water. If she starts yelling that sounds like pain, be sure to quit that. Flap, try and get away. But they are easily controlled. Don't let go of her at all. She may injure herself if she gets loose from you. And you sure don't want that !
 
Just lift her legs? Up and down and forward and backward. See if she can stand a little in the water. Massage her legs in the water. And her toes.
 
How wet can chickens get? I know they don't like it. I talk alot while bathing Whispers. Whispers is an Australorpe medium size. She did settle down. She was completely wet EXCEPT 
around her nostrils, head and beak. (The birds outside like the robins, grackles like to take water baths. I have watched the girls near the water pools and they do not venture in like the wild birds do).
 I toweled dried and I did use a blow dryer on low. She did fine.
 
Can you tell I am new chicken momma?   Well I would say that new chicken momma's are THE best momma's.
And believe me I loved being a new chicken momma when I got my first baby girls. I was thrilled.
 
The sling looks just great.