Strip of back end bare!!

[DebraMarvinchicks]

One of my leg horns is bare in the back and like a long strip up. My chickens are just a year old and I’ve never seen this. Very concerned because I have not lost a chicken yet! I can’t get a pic right now because I’m babysitting. Any suggestions would be of great help! Thank you

 

[oldhenlikesdogs]

Do you have a rooster?