my guinea pig keeps humping the other

[Smallpetqueen]

so I have 3 piggies and one, keira, is definitely the dominate one whilst the other two are more nervous but keira keeps humping the other two and they are puring keep in mind they are all females please help is this normal.

 

[Free Ranger]

Good Morning Canada and welcome to the forum! It's early here but folks are coming on-line all the time so do you have a few more details pls. The experts will want to know how old are the piggies, how long you've had them all in together, did you get them all at the same time or add one etc. Dominant females can be behaving like this so in that sense it's a normal piggie thing - it's just the circumstances and whether it's been going on a long time.

 

[Piggies&buns]

More information is needed.

however, it is normal, It is a dominance behaviour and sows will do it when they are in season. It could also be that your piggies are teenagers (4-14 months of age) which is when you will see a lot of hormonal dominance behaviours.
However, there are circumstances when it can be a sign of a problem if they do it a lot and if they appear to be in season all the time. Appearing to be in season all the time can be a sign of hormonal problems (ovarian cysts) but it depends how old they are and whether they are in the age range for cysts to be an issue.
how do the other two piggies respond? Do they allow themselves to be humped? Do they submission squeal or do they fight back? keeping a trio of piggies together can sometimes cause an outsider situation where two form a close relationship and one gets left out - not always but a trio can be the hardest character combination to get right

 

[Siikibam]

Some more info would be great. How old are they and how often does Keira jump the other two?