Yes it is the teen hormones!! I also had a Hen that was my favorite. Every time I gave another hen attention she would come over and peak the hen real hard! I didn't know why she who do that and then I realized she was jealous! LOL!
I was about to go with sand after reading why I should use sand but then I read this
http://www.fresheggsdaily.com/2013/07/the-real-scoop-on-using-sand-in-your.html
SAND IS A REAL BAD IDEA!!