Some individuals develop a strange addiction to eating their cat's fur. This behavior, known as 'pica,' is a result of a condition called 'trichophagia.' People with trichophagia have an uncontrollable urge to consume hair, which can lead them to eat their own hair or, in some cases, their pet's fur. Trichophagia is believed to be associated with nutritional deficiencies, mental health issues, or sensory processing disorders.