Help hen with pasty butt?!

[Pebbles25]

Got this today! How much should I give her?

 

[Pebbles25]

Huge update: She was moving around a lot more this morning. Went to clean her crate out and found an egg membrane, which explains why she is looking better. So I’m guessing I don’t need to give her any rennies? Her crop is empty now and she is eating again. So I’m now gradually accustoming her back to outside again. Here’s hoping she won’t kick her water over and kick wood shavings out into my house more than she’s done already