Sick hen please help

[Ingavid]

One of my hens got sick very suddenly- lethargic, pale comb, bright yellow watery poop. I held her and petted her head and neck for about an hour with her eyes closed. She just jumped off my lap but is just standing in one spot. Could she have eaten something poisonous while free ranging?

 

[azygous]

It sounds like a reproductive infection. Hens can get them as easily as some women get urinary tract infections. The bacteria just seems to get up there somehow. I suggest an antibiotic such as this one. https://www.kvsupply.com/item/aqua-mox-250mg-capsules-100-count/P06184/ One capsule per day for ten days.