How do you know if a guinea pig is fat or pregnant?

I've recently gotten a female guinea pig from a pet store and she has gained some weight since I've gotten her. The pet store didn't keep track of her age, but I've determined that she's between 8-13 months old. That's a wide gap, but it's something at least.She was housed with only one other guinea pig as far as I'm aware of, and I've gotten both. I checked and I'm pretty sure they're both girls.Also, where would you press on her stomach to determine if she is pregnant or not? Or, when would I be able to tell if she was?

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Recommended Answer:

Check with the pet store. Ask them if there's a possibility she was with any males. If she was, then start counting from the last possible day she was with a male. Guinea pig pregnancies are around 70 days. Lots of times pet stores mis-sex guinea pigs. Often when someone buys a pig, the pig gains weight in the new home. Perhaps that's what's going on.There's really no where that you press to determine pregnancy. A vet might palpate, but even that's not conclusive. To really find out you'll need an ultrasound.

Other Answers:

• You really don't have to press on her stomach anywhere but rather determine if the other guinea pig is a male or female. It's quite easy. Here is a link http://www.cavyspirit.com/sexing.htm - if it's a female, no problem and most likely if she has been with the same GP for that long and it was a male she most likely would have been pregnant already. But if she is pregnant that site will also give you Information on how to tell.
• if shes preggers she will look wide on her back half of her body.