Pets recognize their owners through a combination of sensory cues, such as their scent, voice, appearance, and specific behaviors. Pets, especially dogs and cats, have a strong sense of smell which helps them identify their owners by their unique scent. They also learn to recognize their owner's voice and the way they look, including their facial features and body language. Additionally, pets can pick up on their owner's habits and routines, which further solidifies the bond and recognition between them.