So you wouldn’t suggest a girl his age?
Boars start making babies from 3-5 weeks of age and sows have their first season between 4-6 weeks - that is basically as soon s they are weaned. We see plenty of cases resulting from mis-sexed pet shop or breeder piggies on here.
Sows come into season again within hours of giving birth. There is no menopause for either gender; domestic piggies are basically nonstop breeding machines until the day they die (goes for both genders).
You cannot step in on time to prevent pregnancies and you are also facing about every 4th or 5th birth ending with the death of babies and/or the mother - and that is guinea pigs in good care; the odds are even worse in less than ideal conditions. And since you are basically playing lottery, there is never any quarantee that you are one of the lucky ones.
A fair percentage of my own adopted piggies over the years have started out with a mis-sexed or intentional bred pair; by the time rescues waded in it had advanced to several generations of uncontrolled breeding that had gotten badly out of hand and what we call a hoarding situation - if just one of the original pair was carrying a faulty gene, babies with major problems will become ever more common from about generation #3 until they are virtually all pups affected not long after.
And yes, rescues have been dealing with those kind of cases.
Your boy and girl will never be able to live together again after the initial meeting unless one of them is safely de-sexed, which is not cheap at all. You only need one mis-sexed baby and the whole circle starts again.
PS: Please accept that we are a strictly no intentional breeding forum. Our discrete courtesy pregnancy and baby section is reserved to help owners dealing with an unplanned pregnancy/surprise babies and any support is only given with the explicit aim of ensuring that there are no more babies.
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