Hen with blood and poop all over vent Help!!!!

[muddychicken2]

I have a hen who has been picked on a little bit and has blood and poop all over her vent. very unactive and not eating at all. Please help

 

[Sally Sunshine]

http://poultrykeeper.com/reproductive-system-problems/ I havent had this. but u can search here until u get help from someone!