Sexing my guinea pig.

Question
I want to sex my guinea pig. How should I go about this?

Answer
Hi Mikel.  If you want you can send me a picture and I'll tell you the gender.  The males have an opening like an exclamation (!) point.  Also if you feel just above the pelvis you can feel what feels like macaroni inside.  Gentle pressure will cause his penis to come out as well.  If you have a female she will have a "Y" shaped opening.  If you feel just at the pelvis you feel bones and no little macaroni.  Hope this helps!
Anngela  astrathm@purdue.edu