Boys Humping Each Other?

[Top4]

So today my two 10 week old boy piggies decide to start humping in the garden during my sons Birthday party!, it dominant one was mounting the other one and humping away?! Is this normal behaviour?

 

[Wiebke]

Hi!

Mounting is not just sexual behaviour, but also very common mild dominance behaviour from both genders.
If in doubt, always re-check the sex! Dominance Behaviours In Guinea Pigs

You may find these guides here helpful:
Boars: A guide to successful companionship.
Dominance Behaviours In Guinea Pigs