Advice Needed On Persistent Mounting

Laaaauren

Junior Guinea Pig
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Hello everyone,

I need some advice regarding my two boys. I know mounting is a common behaviour between boars, even for those who have been housed together for a good length of time. We adopted a young boar called Casper (currently about three months old now) not too long ago to give our older boar Pebbles (roughly 4.5 years old) some companionship after he lost his brother. We introduced them slowly, following all the correct steps to ensure both felt comfortable with the other. The bonding seemed to work well as there was very little aggression besides the occasional teeth chattering, rumble strutting and mounting.
Currently they are living together and have two of everything (bowls, bottles, houses etc) to avoid any disagreements but for the most part they seem to be alright with each other.

However, Pebbles is currently on anti-inflammatory medication for an unidentified mass on his side (which seems to be going down, fingers crossed 🤞🏻) so he’s a little uncomfortable because the vet believes it may have been putting a little bit of pressure on his gut. He’s still eating, drinking and acting as he normally would for a piggy of his age but one problem we’re facing is Casper keeps mounting him and from the squeals Pebbles is making it sounds as if he’s uncomfortable. I know that often it can sound a lot worse than it actually is and Pebbles used to mount his brother and vice versa. However, I don’t want to risk him becoming stressed or even more uncomfortable as it could put him off eating. Casper is very persistent - last night he would not leave poor Pebbles alone, he would mount him regardless of what he was doing. I was constantly having to take Casper off him and put him in another part of the hutch but he would just go right back once I’d shut the door.

I just want to keep my boys happy so any advice is appreciated! 🙂
 
At Casper’s age, He is just coming into his teenage times, his testicles are descending and he is experiencing hormone surges. You can expect this to last in bouts until he is around 14 months of age. You aren’t going to be able to stop him from doing this. You will want to keep a close eye on how pebbles is reacting to ensure his medical issues aren’t made worse by it but you don’t want to interrupt their bond either. if pebbles is starting to recover (you say the mass seems to be going down), then I would be inclined to leave things as they are but keep watch for now.
 
Hello everyone,

I need some advice regarding my two boys. I know mounting is a common behaviour between boars, even for those who have been housed together for a good length of time. We adopted a young boar called Casper (currently about three months old now) not too long ago to give our older boar Pebbles (roughly 4.5 years old) some companionship after he lost his brother. We introduced them slowly, following all the correct steps to ensure both felt comfortable with the other. The bonding seemed to work well as there was very little aggression besides the occasional teeth chattering, rumble strutting and mounting.
Currently they are living together and have two of everything (bowls, bottles, houses etc) to avoid any disagreements but for the most part they seem to be alright with each other.

However, Pebbles is currently on anti-inflammatory medication for an unidentified mass on his side (which seems to be going down, fingers crossed 🤞🏻) so he’s a little uncomfortable because the vet believes it may have been putting a little bit of pressure on his gut. He’s still eating, drinking and acting as he normally would for a piggy of his age but one problem we’re facing is Casper keeps mounting him and from the squeals Pebbles is making it sounds as if he’s uncomfortable. I know that often it can sound a lot worse than it actually is and Pebbles used to mount his brother and vice versa. However, I don’t want to risk him becoming stressed or even more uncomfortable as it could put him off eating. Casper is very persistent - last night he would not leave poor Pebbles alone, he would mount him regardless of what he was doing. I was constantly having to take Casper off him and put him in another part of the hutch but he would just go right back once I’d shut the door.

I just want to keep my boys happy so any advice is appreciated! 🙂

Hi!

Any illness can change the hierarchy; especially as it coincides with the testicles starting to descend and a first large hormone spike in Caspar. Submission squeaking can be very distressing.

You can put a divider in the cage for a couple of days and then re-introduce on neutral ground, but please be aware that too many separation will put an extra stress on the bond and can contribute to destabilising it further.
Boars: Teenage, Bullying, Fighting, Fall-outs And What Next?
A Comprehensive Guide to Guinea Pig Boars
 
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