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.

He then spills the salad gently down onto the ground around them, and the ravenous rodents make quick work of their lunch.

Guinea pigs can learn people's voices. That's why every time Elizabeth Mack goes downstairs and says good morning, she's greeted by a high-pitched chorus of squeaks. The squeaks continue whenever Mack ...