Brothers!

[harveb]

Hi everyone, my piggies are 5months old and I have read that they go through a hormonal stage but pickle the larger of my 2 has started teeth chattering and shoving his bum in patch's face, is this all normal behaviour or do I need to seperate them? It's the teeth chattering that is worries me

 

[lauraboara]

Yes it sounds are though the hormones are kicking in! Rumbling, bum waggling, chasing all part of the hormonal stage. Mild teeth chattering is OK and typical but I would monitor it - it is warning noise. If they did fall out though the teeth chattering is lot, lot louder. Have you read the Dominance sticky thread
https://www.theguineapigforum.co.uk/threads/dominance-behaviours-in-guinea-pigs.28949/
It is good that you are observing them. Have they got 2 bowls and hideys with 2 entrances (so they can get out if chased)?

 

[harveb]

Yeah I've given them 2 of everything, they are in a pretty big hutch aswel, I will keep an eye on them and hope that it doesn't escalate

 

[Poppy'sMum]

Serious teeth chattering sounds a lot like clacking, it's far more frightening & distinctive That is usually a prelude to a bite.