Bonded at rescue, but trouble once home

4boipigs

Junior Guinea Pig
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I boarded my 4 single males (who live in divided cages) at a local rescue while I went on vacation this week. The rescue tried to bond them while I was away. The only possible pair acted like two peas in a pod, snuggling and getting along great. They even rode home in a box and slept together. Before I brought them home, all fleece was washed and I cleaned the hides and the coroplast. Now it's like their bonding never happened. They are in a 2x6 c&c. There are 3 hides/tunnels. There are no one-way tunnels for them to be trapped in. Two water bottles, and one big hay pile (plan on splitting it 2 areas shortly).

One of the boys, who is a bit over a year old, was previously bonded with an older boar that passed away last year. I tried to bond him with a 2 year old from a shelter, but the bonding didn't work. The other boy is 6 or 7 months old, and has never been bonded. He lived in a divided cage with another male.

They're doing the usual rumbling, humping, chasing, and so on. Which I know is all NORMAL but they had some scuffles. They did have a couple fights but no blood drawn so far. That's what I'm most worried about. During the chasing, it's always the younger chasing the older. The younger one seems to be starting the fight. He puffs up, moves his body to the side and then literally goes flying at the other boy. Then they rest/sleep, or go eat. We've made a little progress to them eating together, but the older one runs off when the younger one comes by.

I just don't get it. What am I doing wrong? I know I should leave them alone to settle their differences. It's just so hard because they seemed to be doing fine at the rescue, and now they're home and bickering. It's only been a couple hours tho. Their bonding session at the rescue today last about 2.5 hours.
 
Hi

There is nothing you are doing wrong. It just looks like the bonding is not working out as you'd hoped. The process lasts around 2 weeks; it is not just a quick intro, which can only weed out the worst personality incompatibilities. It can go wrong at any stage.
I would recommend that you put a divider in overnight and then see how they are with each other on neutral ground again by tomorrow.

If things are getting out of hand soon after, then the bonding has failed. Flying tackles are usually based on fear, not aggression, by the way. It is the strongest worded way of saying 'stay out of my space'.

A - Z of Guinea Pig Behaviours
Dominance Behaviours In Guinea Pigs
 
The move to your home will have disrupted any bonding and they will once again need to establish dominance. You’re doing nothing wrong. They just need time in their new home to work it all out. Please be aware that at 1 Year and 6-7 months they are both still at the hormonal stage and the bond will need to be carefully observed to see if it will last long term.
 
Hi

There is nothing you are doing wrong. It just looks like the bonding is not working out as you'd hoped. The process lasts around 2 weeks; it is not just a quick intro, which can only weed out the worst personality incompatibilities. It can go wrong at any stage.
I would recommend that you put a divider in overnight and then see how they are with each other on neutral ground again by tomorrow.

If things are getting out of hand soon after, then the bonding has failed. Flying tackles are usually based on fear, not aggression, by the way. It is the strongest worded way of saying 'stay out of my space'.

A - Z of Guinea Pig Behaviours
Dominance Behaviours In Guinea Pigs

Thanks, I ended up adding the divider again. They got into 2 scuffles that resulted in them rolling around the cage like they were in a cartoon. No injures from what I could see. I'll try again tomorrow.
 
Thanks, I ended up adding the divider again. They got into 2 scuffles that resulted in them rolling around the cage like they were in a cartoon. No injures from what I could see. I'll try again tomorrow.

They are obviously neither of them aggressive by nature but the new boy is obviously overwhelmed by the situation and is what I call fear-aggressive. the 6-7 months old is at the hormonal peak of teenage and at the most difficult age for boar bonding. :(
 
I haven't yet put them back together. The older one is biting at the divider and trying to dig to the other side. The younger one couldn't care less. Is there a divider option that he can't bite or get his face thru? I know there are plastic c&c windows, but I'm not sure if that is going to reduce them being able to interact.
 
I haven't yet put them back together. The older one is biting at the divider and trying to dig to the other side. The younger one couldn't care less. Is there a divider option that he can't bite or get his face thru? I know there are plastic c&c windows, but I'm not sure if that is going to reduce them being able to interact.

Can you overlap some additional grids to make the gaps smaller temporarily. Over time they may stop that kind of behaviour once they are used to living side by side.
 
I covered the grids with spare corex using bull dog clips and removed it for 15 - 30 minutes a couple of times a day for around 2 weeks until they gradually settled. I did have one pair who were very aggressive at the divider and the constant bar biting was upsetting for humans and other piggies in the room. We covered their grids with perspex, attached on the side of the worst aggressor, (my partner drilled holes top and bottom to attach it with cable ties) not ideal as they couldn't touch noses but they could talk and see each other. This was the only way they could remain side by side without Red wearing his teeth down to stumps.
 
Can you overlap some additional grids to make the gaps smaller temporarily. Over time they may stop that kind of behaviour once they are used to living side by side.

I will try that. My concern is he will still find a place to latch on. Currently I put in these plastic mats with spikes that are marketed to keeping cats off stuff. He can’t chew on the bars but he is managing to maneuver his head to chew the plastic.
 
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