I am NO quail whisperer by any means. I’m new to the madness myself. I would guess they are trying to establish who is boss. If no damage is being done I would leave them. BUT I would have a plan in place if it gets worse and you need to separate them.
Just use dry dirt from the yard. They will love it. Better yet do this: take the dirt from one of your moms favorite plants. When she ask what happened tell her you were to busy to take me to the store :lau