that's because we (in captivity) can't give them as much space as they would enjoy in the wild so yes they do all fight - sadly.
I have given up trying to sell more than one dwarf hamster it always ends in tears!!
Robos only breed when they want to, SarahC is right it doesn't actually take very long BUT that's only the act itself, sometimes they wait season after season after season AFTER season :lol:
However, I would say they have bred if they're fighting it would indicate the female has taken, they often chase off the males when they're no longer required
