How To Tell Male From Female Kitten?

I have a female kitten that is about 2 weeks old, and I am trying to tell if it is a boy or girl just by looking at them. It’s been difficult because none of my boys are around yet lol. I think they might be males though because the one who came from the litter was a little hard to tell… Read more ยป

http://wiki.answers.com/Q/How_to_tell_male_from_female_kitten

On top of being so adorable, what kind of problems do cats have?