Reintroduction- senior boar afraid of younger boar?

dinkybutt

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Hi everyone. A few weeks ago, one of our little boys passed away from a URI leaving his best buddy Nibbler (age: 5.5 y/o). We were afraid Nibbler would become lonely considering him and Yancy had been together since they were very young. 3 days after Yancy’s passing, we adopted Owlie (2 y/o) from a shelter.

We introduced the boys in a neutral set up with our senior, Nibbler, showing to be the dominant piggie. Owlie was very submissive. They got along pretty well, eating together, napping right beside each other, Etc. However, about 2 or 3 days later, we saw Nibbler get humped by Owlie, with boar glue all over his cute little butt. That same day, we noticed Nibbler behaving unusually: not eating or drinking much, being still, things of that sort, so we took him to the vet. They didn’t find anything wrong, but took precaution and prescribed antibiotics just in case it was an early start of URI. The vet said it could possibly be stress of introducing a new piggie and being humped. She advised we separate the 2 “possibly forever.”

Um, we weren’t quite sure with the whole separating them forever thing considering they seemed to do so well prior, but we did separate them with a gate going down the middle of their cage until Nibsy seemed strong and healthy again. 2 nights ago we reintroduced them in a neutral zone, and Owlie was right off the bat dominating Nibbler. The normal chattering, chasing, and introduction behavior, but Nibbler getting humped every few minutes.

So, what I’m concerned about is that now Nibbler isn’t moving much again. He’s eating and drinking, but mostly sticking to one corner. Owlie is still humping Nibbler and they’ll chase and nip at each other for a little bit, but they also seem to be doing okay with each other. Owlie will come over to lay with Nibs, and they’ll take naps together and forage and eat hay and treats together. Any opinions or advice on this? Why is Nibbler only sticking to one spot? What can we do to help him? Do you think he’s stressed and afraid of Owlie? Should we separate them again?

Anything helps! Thanks to all!
 
some photos of them when they seem to be getting along
 

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:wel:

Do all your hides have two exits?
How big is their cage?
Do you have multiple of every item in the cage including multiple hay piles?
Importantly, how is Nibbler’s weight?

Humping is entirely normal and how boars bond but if it becomes excessive to the point it is constant, one piggy becomes withdrawn, loses weight through reduced food intake (either through stress or the other piggy food hogging), then it can tip over into being bullying which can mean they need to be permanently separated as such a dysfunctional bond won’t work.

When you separated them last time, did Nibbler perk up? If so, then this can be a sign that he simply doesn’t want to be with Olwie.

It does take around two weeks post introduction for them to fully establish a relationship but the guides below explain further information on behaviour and spotting a dysfunctional bond

Bonds In Trouble
Moody Guinea Pigs: Depression, Bullying, Aggression, Stress, Fear and Antisocial Behaviour
Bonding and Interaction: Illustrated social behaviours and bonding dynamics
 
Last edited:
:wel:

Do all your hides have two exits?
How big is their cage?
Do you have multiple of every item in the cage including multiple hay piles?
Importantly, how is Nibbler’s weight?

Humping is entirely normal and how boars bond but if it becomes excessive to the point it is constant, one piggy becomes withdrawn, loses weight through reduced food intake (either through stress or the other piggy food hogging), then it can tip over into being bullying which can mean they need to be permanently separated as such a dysfunctional bond won’t work.

When you separated them last time, did Nibbler perk up? If so, then this can be a sign that he simply doesn’t want to be with Olwie.

It does take around two weeks post introduction for them to fully establish a relationship but the guides below explain further information on behaviour and spotting a dysfunctional bond

Bonds In Trouble
Moody Guinea Pigs: Depression, Bullying, Aggression, Stress, Fear and Antisocial Behaviour
Bonding and Interaction: Illustrated social behaviours and bonding dynamics
Hi, thanks for your reply!

Cage size: 2x4 cc grid 28x56. 2 of everything, multiple hay piles, however no hideys yet as when we put them in initially the pigs started to get feisty with each other. My husband is going to put their hideys in now to see what happens…… update: no fighting with the hideys in yet.

Nibblers weight 3 days ago before we reintroduced them: 1060g. The past 2 days 1020g. Well, when we separated them, we were force feeding him critical care and antibiotics and pain meds. After a few days Nibbler did start to perk up again and become his usual self. As stated earlier, we don’t know if it was stress or being sick.

We will keep the boys together still and continue to monitor their behaviors. I’m really hoping it’s not bullying :(
 
Keep a close eye on the behaviour, and Nibbler’s weight.
If the humping is relentless and he becomes withdrawn because of it then you are going to need to separate them.

His weight drop isn’t yet considered weight loss - it’s still within normal fluctuation but anything over 50g is a loss and requires action to be taken

Weight - Monitoring and Management
 
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