yeah, be careful on that board. I saw your posts, and I can tell you, people will get crazy about you letting your animals breed. They don't like breeders on that forum. Also, they seem to want people to have a guinea pig vet on hand and buy pellets and stuff. I've seen it mentioned several times that guinea pigs should never be outside and should have a pelleted diet. They obviously would get mad if they knew you were eating them, so leave that part out.
Some of these pet forums are truly fanatics. And they have some terrible device. Like surgery on a guinea pig! WHAT?!?!?! do not do that, put the poor animal down, out of its suffering, don't operate on a rodent.
so with the operating on them, usually that's a pretty noninvasive procedure involving bladder stones, second domestic(pet) guinea pigs live on average seven to nine years, depending upon breed. the cuy live three to five. i personally know someone with a hamster that has only been handled when transitioning the cage from the pet store, and it's 18 years old. she got it when she was six. stress does a lot to these animals, and breeding them calmer(as pets) has lead to longer lives as well. that site is pretty fanatical, but the operating isn't like if they have cancer or kidney failure or something, it's mainly the bladder stones. and nine years is a reasonably serious pet. sure, it's a rodent, but... it lasts longer than most relationships do. if you're raising cuy, obviously that's silly, but it's worth pointing out that the biggest cause of bladder stones(which usually happen right around nine months of age) is when someone doesn't transition from high calcium for growth alfalfa pellets to timothy hay pellets. same goes for other veggies. sorry if i came across as rude, i just wanted to explain the like... lifespan basically. i mean, i keep oscars and turtles, and oscars are "just a fish" but they live right around fifteen years normally, and they're aware of the world outside the tank. if my oscar got sick from something i could have prevented, i'm gonna do my best to help it get better, because i'm not eating it, and it could have lived another ten to twelve years if i had provided for it like i should've, you know?