Hi, all new guinea pig meetings should be in a neutral space to stop spacial domination.
Chirping that i’ve seen from my boy has been anxious/fearful. He goes in a trance like state and i have to pick him up to get him out of it but as was said above it’s such a rare thing we don’t really know what it means.
Please make sure your boys have adequate space and plenty of space to run/hide. Two of everything is recommended especially in boars. Even the most bonded pairs need time to themselves.
The bonding process can be tough but here’s a few things to look out for.
Bullying - Sometimes larger pigs tend to realise this and push their weight around. I would look out for not allowing the smaller pig to eat veg while their eating, not allowing them to hide or being overly protective of certain areas/things.
Failed bond - The obvious things are sort of major aggression. But one easy way to know is if blood is drawn through biting, head raising and nipping can occur but often they work it out themselves, but i would recommend keeping an eye on them incase it turns ugly.
Successful bond - In terms of success in bonding i’ve seen often cuddling up, hanging out together and even seeking comfort in each other. Example you accidentally drop something and they run to each other.
In this time please have them checked at the vets, they also would be able to sex your pigs if you are struggling.
Bonding with you is another big thing, so a couple tips to gain a guinea pigs trust is hand feeding and just sitting and speaking to them. Holding can be a great way to bond but often guinea pigs don’t want to be touched and grabbed from the air, so i would recommend picking them up in their favourite cozy or something.
Bonding isn’t linear but i just recommend keeping a close eye on them and giving them time to work things out.
Crossing my fingers all goes well x