Guinea pigs communicate with each other and their owners through various vocalizations, body language, and behavior. They make different sounds such as squeaks, purring, chirping, and teeth chattering to express their emotions like happiness, fear, or annoyance. They also use body language like grooming, nudging, or wagging their tails to communicate with each other and their owners. Guinea pigs can also show affection by seeking attention, following their owners around, or even giving gentle nibbles. Bonding with your guinea pig through regular interaction and observing their behavior can help you better understand their communication cues.