Do hamsters fight if they mate?
Yes hamsters may fight when mating. So be prepared to separate them when they are mating. Put them back together when they have calmed down.
hamsters can be with other hamsters but it just isn't safe to let them live together if nobody is watching them all you have to do for hamsters to mate is let them play in a box or in a critter playpen for about 30minuets while supervised and they sometime mate but it might take a few play dates just watch them so they don't get in a fight.