Mazda's Suspicious Tail Feathers

Hmmm.

We can't figure out what happened to one of our rooster's tail feathers.  It somewhat looks as if a person cut them off with scissors.

We are pretty sure it wasn't the other rooster.  Sparta is afraid of Mazda now, and typically runs away from him. 

I wonder if the goats got a bite out it?  A few are growing back already, but it sure looks suspicious to us.  We did some research and people actually steal rooster feathers to put in their hair.  We've had the dogs bark at 3am, two nights in a row, but saw nothing.  Next time, I'll be taking a flashlight to the chicken barn, just to be sure.