Is this a bald keel area?

[Chioflock]

Hello I am still looking for answers for my chicken with a bald spot in between it legs, not her bottom. I will attach pictures. Is this the keel? My blue is a 7 month old chicken that has been laying for 2.5 months. Saw this bald patch, and check for crawlies and couldn't find anything. The skin looks clean and healthy may just some little dry in some areas. Ideas??? Someone already suggest perch rubbing. What else could it be. I noticed a dropped in egg production. Don't know if she is the one that is not laying. Please!!!

 

[Weeg]

Looks like roost rub to me. I have no experience with that so wouldn't know exactly what causes it, or how to prevent it either. Hopefully others can offer more insight.