I think I have 2 sows...but I'm not sure. Help?

[veesilver]

Hi! I just got two sows a couple of days ago, but I've been advised to check them as well just tbe sure...and well, I don't know.
I attached 2 pictures, please help me out xx

Note: I am aware the piggies are currently very dirty (from their previous environment) and will clean them soon.

 

[Bradshaw Piggies]

You might find this sexing guide useful: https://www.theguineapigforum.co.uk/threads/illustrated-sexing-guide-for-all-ages.156297/

 

[Siikibam]

Check for the presence/absence of a penis ridge above the button. And the presence/absence of a fleshy seal just inside the slit. You can also compare them to each other and see.

I would hazard a guess that the one on the right is a girl.