Species & Genetics question

Question
This is a question on what species my guinea pig is. She is brown with semi long shiny hair, black and brown mixed hairs. She looks like the original guinea pig before they were put in captive. I'm thinking satin teddy or Agouti Rex or Cinnamon Agouti English Crested. LOL. help please!! Here's links so you can see what she looks like:
http://www.t3rbo.com/photo/view.php?img=75b1cb50640c43fa3ca951b00617fcd5
http://www.t3rbo.com/photo/view.php?img=7df3340ad8651cb40319047fedfd2730
http://www.t3rbo.com/photo/view.php?img=ce81dd8903d42856832c9d5b9ef2d65f

The pup was born early this morning. My second question is how did the baby get grey? There isn't a hair of grey on either the sow or the boar. Here's a picture of the father:
http://www.t3rbo.com/photo/view.php?img=f2c23e307dd9bc369772527cc4be5c48

Thanks a bunch!!!

Answer
Hi V,

    First let me tell you that your guinea pigs are absolutely adorable !  The father looks like the first guinea pig I ever had (=

    Your sow (female) looks to me like she may be the result of two different breeds - a smooth american and a rosetted abbysinian.  Her coloration consists of broken patches of red agouti (not brindle, for her baby was a variation of agouti) and gray-black, which further supports the idea of mixed parents.  Your boar (male) looks like a type of broken tortoiseshell-and-white.

   In order to accurately tell you exactly how the babies came out gray, I would need to take a look at their parentage as I did when I predicted the coloration of offspring during my own breeding experiment.

   I won't pretend your gray babies, cute as they are, don't baffle me a little, for the gray should be 75% of the time dominated by the black and dark brown of his parents (I drew a few punnet squares for your piggies' genes based on their appearance).  Also because I did that, I thought I would tell you that I figured out that at least 50% of the offspring should be half agouti, or have ticked fur, 50% should have rosettes like the mother, and 100% should be partially white.  The gray color still remains a mystery, and the solution must lie in gray agoutis in their pedigrees somewhere.

    Thank you for your question, I hope I was of some help to you.  If I was unclear at all or if you have any further questions, please do not hesitate to ask.  Good luck with your adorable guinea pigs!

                                             - Nicole