stella, even though I'm not the breeder, I, as vet assistant have took them (four) to vet (fun to weight them in end of weekly). four vets couldn't tell one out of three boys if she's a boy.
in fact, the second paw in my signature, "he" is the only unisex feline I have. but "he" eats like a boy and I already have a lot of females in here

anyway, the first shot they should get will be when they're 9 weeks old. now they are only five...almost six weeks old. yes! they're so big already I wanted the name of breeds, not the advices, thanks!