Guinea pigs are small animals with big opinions, and squeaks are the fastest way they share them. These sounds typically begin early, often within two weeks of birth, and continue throughout the day.

PITTSBURGH (KDKA) — From the hay and the woodchips to the squeaks and the “wheeks,” Julene Robinson’s got a full house of rescue guinea pigs. She said people now know her as the guinea pig lady.

Guinea pigs may be small and quiet to the outside world, but within their tiny bodies lives a rich emotional universe. They do not speak in words, yet they communicate constantly through sounds, ...