Chicken behavior

[1st time]

As I am a 1st timer just like my name I have a partridge rock that has started to act a little strange. She is laying on the floor of the coop instead of on the roast or in a neat. She seems to be acting like the other chickens and eating / drinking as far as i can tell. Is this strange for a chicken?

 

[jjrj254]

She could be coming down with something, that's how one of my buffs started acting before she died

 

[1st time]

I spoke with someone who I bought my chickens from who raises chickens and she said possible botcholism. My ducks and chickens share the same coop and run. There is a small pool in their run that they stay in from 6am to 3pm. Any suggestions I was told that her food pouch is full which is a good sign. I did not see any signs of worms at her but. She lays around and if she gets up she is very slow moving. She also told me no cure just to keep her stress free but could place some b12 in her water.