Guinea Pigs/New Pets


I recently took-in two boars from a family friend who had owned both of the boars for three years and they have always been togather , but recently (i`ve only had them for about five days.) ive seen them begin too what seems to be humping eachother or pushing eachother around? I`m not sure if this is fighting or something that they normally do , it only happens everyonce in awhile after I feed them or at night , I give them equal amounts of food and love and dont show favoritisim towards them , but they always seem to be making some sort of trouble with eachother. When i contacted the owner she said it was normal and they had been doing this for awhile which had eased the thought of them possibley being stressed out my thought now is its over territory , but again im not sure becuase they seem fine for a few days or hours and have no problems?

         Many Thanks,

The previous owner is right, this is a normal behavior. Sometimes we even see this mounting with sows. There may be a bit of stress with the new location but they should settle in just fine within a few days.

Pushing and mounting is not fighting. When two boars fight there's no question about what's going on. You will see the hair on the back stand up, they begin to make a growling sound as they circle one another. Next thing you see is fur flying and someone getting bitten, badly.

After three years of being together they're probably going to continue their peaceful relationship. Sometimes when two boars are raised together one or both of them begins to show hostility as they reach sexual maturity. It's caused by their natural hormones and they have to be separated. But after this length of time it's doubtful this will happen. Especially if there are no females around for them to smell. As females we always seem to bring out the worst in some men!  

If there are no wounds and no evidence of serious aggression I don't think they're going to start now. I think this is just an adjustment period that will hopefully pass. But keep an eye out for any sign of anything that might mean real aggression.  If that happens they keep them apart.  

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Pat VanAllen


As is sometimes the case, people in urgent need of information have a higher degree of expectation than those of us as experts are able to give. The experts on this site do their best to give the most accurate and responsible answers possible. We ask that you remember that it is not our intention nor place to criticize the professional advice given by your veterinarian, nor is it appropriate for us to comment on the correctness of a diagnosis made by a licensed physician. Our knowledge is experience based. Although many years of breeding and showing cavies gives me a wealth of experience it cannot change the fact that we as experts are not veterinarians and therefore may occasionally have to reject questions that appear to be asking us to criticize advice given by the licensed professional. Having raised and exhibited cavies for many years I have extensive experience in cavy care and husbandry. I currently have an active breeding program for pedigreed show animals but do not encourage backyard breeding for inexperienced owners. Although I don't encourage breeding for fun I'm always happy to answer any questions from an owner who is in sincere need of help. Pet owners wanting to breed should understand that even experienced breeders have litter losses. The mortality rate is high in cavies. The chance for losing both sow and pups is always present, even with experience. Although this is a site for experts to assist owners, there is no expert in any field who has all the answers. The wisest thing a good expert can know is their limitations. Not having an answer does not diminish one's ability or knowledge. It simply shows that we recognize our limitations and operate within them.


Raised and shown cavies for many years, having aquired my first cavies in the early 1970's as pets. My caviary currently handles 65 + animals in two different breeds and several varieties. Having been in the health care industry as a licensed nurse for 35 years I have hands on experience with care and needs in both humans and cavies. Member of American Rabbit Breeders Association and American Cavy Breeders Association.

Awarded Lifetime Membership in of one of the oldest cavy clubs in the United States, on whose Board I served as Sec/Treas for six years and currently serving as President. Also editor/publisher of the club's quarterly newsletter. We are strong supporters of our youth exhibitors, most of whom are 4H members who are working on cavy projects. Through these projects they become good responsible citizens. We deal with all aspects of showing, breeding, caring for and sharing experiences in the fancy. The cavy fancy is not a new one but in some areas is still relatively unknown. Our goal is to inspire interest in high quality, responsible breeding to improve the species, not just the reproduction of guinea pigs. Our job is to educate owners to help them make the right decisions and choices in the care of their cavies.

Graduate in nursing. Certified in emergency medicine.

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