[header] How to sex a hamster [title] Wait for the right time to inspect the hamster. [step] To determine sex, you are going to have to look at your hamster's hind end and underside. Your best bet is to wait until the hamster is alert and relaxed to examine it. 
Grabbing a sleeping or stressed hamster is a good way to get bitten. [substeps] Try giving your hamster a treat and some attention.