How do I tell if its a boy or girl?

Question
Well, my Guinea pig just had babies on October 17 2006, and I still can't tell if they are boys or girls. I've looked and all the areas look the same. People are wanting to take these Guinea pigs, but two of them have to be boys, and I can't give them away until I figure out what they are. So how do I tell if it's a boy or girl?

Answer
This is the best website with pictures that can help. It's hard to describe what a female and male look like without pictures. Here are a few tips from the website on how to tell them apart.

Females (sows): The sows usually have a smooth swelling over their genital area. Sometimes, it can be bumpy looking, making you think it mig2t be a male! If you gently part the genital opening, on a sow, a "Y" shaped opening should appear.


Males (boars): Press gently just above the genital area. If it's a male, you should be able to make the penis slowly extrude. Don't be fooled by appearances. Sometimes, it doesn't look like there is a penis there at all! Especially in heavy, older males, the penis can be "tucked away" in folds of skin, looking entirely like a female! You should TRY to get the penis to ease out.  


HOT TIP! If it is a male, you can usually feel the inner part of the shaft (which is under the skin) in the same area--just above the genitals -- by very gently pressing and rubbing your finger over that area. You will feel a "ridge" just above the penis.  

Also, if there is a pucker or protrusion of skin at the top of the genital area, then that is a good indication that there is a penis tucked away underneath. But, be sure to get it to extrude to confirm it.

Young males have a donut shape around their rectum where their testicles are.