How long do clowns fight before switching gender?

[Wayne]

Does anyone know roughly how long two occ clowns will fight before they determine gender? I just added another occ clown and its pretty clear which one is the more dominatant one. Just wondering how long the fighting will go on?

Also both of there genders are unknown at this time, they are both quite young and equal in size... I haven't seen them lock jaws yet, but is there any other way to tell?