Kendalle, that's an excellent observation, but one that I've given up making since people tend to "poo-poo" it. Guinea pigs are suspectible to a variety of parasites and fungi (which are annoying, but not typically dangerous), as well as bacterial issues which can be very dangerous.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry