Hello I just bought a hamster and what should I expect from my own hamster on behavior with the new boy my is a girl and I had her fro a year or a lil over a year Would anybody be able to help me with this question thanks.

The boy will dominate her and you will hear fights. He will mount and you will have babies. Same thing happened with mine. I asked for all females and they gave me one of each. Had babies. Adorable, you'll love them.

@Carlos Garcia the boy it’s still a baby tho my girl hamster way older then him from what it look like to me but how can I find out by my self with out calling the store I got it from what I see is that the female bumps her nose on the male or try to punch him with her hand 🖐 ones I’m a while or she goes on top off him and yeah also ones I put him in today one of them were fighting idk witch one tho lol help me out leave them in the same cage or separate