Well, there is your issue solved. :) Probably the most likely cause of her not showing. Especially since she is confirmed in foal by a vet, not your farrier. (Lmao... wish I wouldn't have missed that thread.)
I don't have a picture of my mare that foaled in 2009 when she was eight months along. She was maiden and if I recall right, she never got really big.
Though, on the other hand. I have a rescue mare that is very close to foaling now. I can share a picture of her when she was eight months along. Keep in mind, she is no where near being a maiden. XD 305472_2185190874693_1394652181_31815276_1515440779_n.jpg
Also, if you would like, you should start a foaling thread for your two girls. :) I'm sure everyone on the forum would love to watch them progress, definitely will want to see the foals.
Good luck with foaling, thank you for keeping your mares in check with the vet.