I'm not so familiar with Cresties. The shop said it is about 6 months old. By looking at the two photos I would like to know if there are any chances that it is a girl? Or quite certain that it should be a boy? Thanks!
It may be possible but that's a big bulge. You really need a magnifying loupe to check for pores to make sure and even then you may not be able to tell 100% until 20-25g.