I have an older barred rock hen. She is a rescue I've had two years.From her condition when I got her I assumed she was old anyway. Last week she was perching hunched up and not filling her crop. Her crop is empty nk sour smell. She also had a dirty bum. White not real bad. AnywaybI brought her in for spa treatment bath soak message the whole works. Probiotic in water. Crushed oats mixed with a little crumble. Inside she is perky bright eyes wants to run the house. Not hunched up. But after a week she still gets paste bum. She wants to eat the cats food dog food rabbit food and what ever looks interesting on the floor lol.. But she hasn't eaten an amount of her food to be normal. I'm trying to let her stretch her legs and not eat stuff until the oats and probiotic clear up the paste bum. Her bum is a little swollen and pink. She is not straining or sneezing. Seems content. No bugs and was wormed with the others. No other hens have dirty bums. Never had one go this long With gleet or paste bum. I'm at a loss what to do different. Any suggestions?