Very Small Pigs?

[Guineapigfeet]

I'm not too worried about them as their 'heft' is fine and they're all eating, pooping and popping as normal, but they are all very little (I think) and was wondering if pups of sibling pregnancies or back2backs are smaller?
My 3 girls are 'about' 8 months old and between 630 and 680 grams. Their weight gains have slowed in the last month but they're not loosing or showing any signs of being anything other than small!

 

[sport_billy]

That is fine weight wise. Do not worry

Sorry for the late reply, your thread has got a little buried

 

[Guineapigfeet]

Thank you for your reassurance, I'm used to right chunky-monkey guineapigs and they feel sooo tiny ! Glad to hear that they aren't unusually dinky