How To Tell If Boy Or Girl Kitten?

I have a 7 week old kitten. I was told by the breeder that he is a boy and shes not sure of his sex. As for now, hes only about 2 inches long and eats like crazy and meows all night (he doesnt go to sleep) but we dont know if thats normal behavior or something else?

Asked by Lilly on Tagged in Other Pets & Animals