Why does Peppercorn keep doing this to Gizmo?

[Gizmoandpeppercorn]

So I just recently introduced 2 male guinea pigs, and my younger male guinea pig, his name is peppercorn, my older male guinea pig is called Gizmo so I recently introduced them and Peppercorn keep trying to mount Gizmo like I'm talking not a second goes by where Peppercorn isn't trying to bother or mount Gizmo, folks tell me, will he ever stop?

 

[Claire W]

Hi, how old is Peppercorn? Mounting is a display of dominant behaviour and is perfectly normal. So long as Gizmo is allowed to eat and sleep, you have nothing to worry about

 

[Piggies&buns]

This is very normal for boars and nothing to worry about provided it stays within normal dominance limits. It will settle down in time but it’s not something that will stop completely. I have a four year old boar pair and they still do it now.
It is a mild dominance behaviour and is something boars will do throughout their lives but a lot during the first two weeks post introduction and during the teenage months (4-14 months of age).
How long have they been together?
How old are they both?

The key with boars is a lot of space - a 180x60cm cage - as they are more territorial. Also ensure all your hides have two exits (no enclosed pigloos) and that you have two of every item in the cage so they cannot argue over anything

Dominance Behaviours In Guinea Pigs
Boars: Teenage, Bullying, Fighting, Fall-outs And What Next?
A Comprehensive Guide to Guinea Pig Boars

 

[Gizmoandpeppercorn]

Hi, how old is Peppercorn? Mounting is a display of dominant behaviour and is perfectly normal. So long as Gizmo is allowed to eat and sleep, you have nothing to worry about

Peppercorn was born in November so he is about 3 1/2 months old give or take, Gizmo is 1 year old, and he likes to rest and relax a lot and Peppercorn literally chases him all throughout the cage and doesn't let him rest.

 

[Gizmoandpeppercorn]

This is very normal for boars and nothing to worry about provided it stays within normal dominance limits. It will settle down in time but it’s not something that will stop completely. I have a four year old boar pair and they still do it now.
It is a mild dominance behaviour and is something boars will do throughout their lives but a lot during the first two weeks post introduction and during the teenage months (4-14 months of age).
How long have they been together?
How old are they both?

The key with boars is a lot of space - a 180x60cm cage - as they are more territorial. Also ensure all your hides have two exits (no enclosed pigloos) and that you have two of every item in the cage so they cannot argue over anything

Dominance Behaviours In Guinea Pigs
Boars: Teenage, Bullying, Fighting, Fall-outs And What Next?
A Comprehensive Guide to Guinea Pig Boars

I just introduced them today and so far it's been 2 hours and Peppercorn is bothering Gizmo non stop and now they are teeth chattering and coming face to face, Gizmo is 1 year old and Peppercorn is 3 months old. Gizmo is very relaxed and calm but Peppercorn is very unsettled and hyper.

 

[Piggies&buns]

Ah ok. I assume then that this is an on spec bonding.
Did you already have Gizmo and you have just bought peppercorn home today?

Their ages make them both teenagers (Peppercorn about to become a teenager) so there will be quite a lot of hormones flying around. Bonding two teen boars isn’t always easy because of the hormones.
Two piggies have to have character compatibility to be able to form a bond and if this is an on spec bonding there is always a risk that they will not be compatible.

Are they in neutral territory for the introduction?

Have you checked they are definitely both male?

Please do read all of the green links I have added in this post and the one above. This one slow explains how to introduce two piggies and which behaviours are positive and which are negative.

Bonding and Interaction: Illustrated social behaviours and bonding dynamics

All the other links explain everything in further depth.

Moody Guinea Pigs: Depression, Bullying, Aggression, Stress, Fear and Antisocial Behaviour

 

[Gizmoandpeppercorn]

Ah ok. I assume then that this is an on spec bonding.
Did you already have Gizmo and you have just bought peppercorn home today?

Their ages make them both teenagers (Peppercorn about to become a teenager) so there will be quite a lot of hormones flying around. Bonding two teen boars isn’t always easy because of the hormones.
Two piggies have to have character compatibility to be able to form a bond and if this is an on spec bonding there is always a risk that they will not be compatible.

Are they in neutral territory for the introduction?

Have you checked they are definitely both male?

Please do read all of the green links I have added in this post and the one above. This one slow explains how to introduce two piggies and which behaviours are positive and which are negative.

Bonding and Interaction: Illustrated social behaviours and bonding dynamics

All the other links explain everything in further depth.

Moody Guinea Pigs: Depression, Bullying, Aggression, Stress, Fear and Antisocial Behaviour

so after 3 hours of being together they ended up throwing each other against the walls of the cage and teeth chattering, what am I going to do?

 

[Claire W]

Rule of thumb is to keep going unless blood is drawn but it sadly doesn't sound good if they are throwing each other against the walls. Are they in the cage? When bonding, you have to do it in neutral territory so somewhere neither pig has been before

 

[Piggies&buns]

If they cannot form a relationship and are starting to fight then sadly they will not be able to remain together. They will need to live in separate but side by side cages to allow interaction through the bars only.