Breeding

How do you tell if your hamsters are breeding or have been bred? I don't even know if the one is even a male! The bigger one from what i was told is the male and the smaller one is a female...they aer dwarf hamsters...the bigger one is t.o. and the smaller one is donovan...does anyone know?

thanks...I have had them together for like 3 weeks...uhhh ohhh... but the people who had them before me said they had little babies but the male ate them :(

yeah, she is very timid and fussy, and she is very annoyed when i move some of the bedding around...