Guineapig Behaviour

So the title says all I have two guinea pigs of my own Buttercup and Junebug Buttercup is oldest and acts more of a leader
Junebug cowers a bit and shows she is loyal to Buttercup
Buttercup she for some reason shows that she is leader by peeing on junebug
Junebug walks away knowing she is the leader

Guinea pig calls:
squeeks week week week it sounds like that It means there happy to see you
And loud shreik is that your guinea pig got hurt
quiet squeeks means its calm
Not whistling or any thing means there alert but scared

I have loved my guinea pigs a lot and they love eating food so keep there food bowls full