ONE THREAD per pig please!
We really want your pig's history all in one place to help you. Pleasedon't start a new thread for a new issue. Just reply to your old one. We can edit the title for you if needed.
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I can't really tell from those photo. If they are male you will be able to feel a firm line just under the skin as they have a bone in their penis, female guinea pigs will not have this firm line.
Here are some photos of my own you could also use to compare.