Cats often bite their feet out of play. Cats are hunting animals, and they have a natural instinct to hunt, and foot-biting behavior may be one of their ways of simulating predators. Additionally, cats may bite their feet because they want attention from their humans.
If cats feel they are not getting enough attention or play, they may use a variety of methods to attract human attention, one of which Just biting the feet. Sometimes, cats may bite their feet because they feel their nails are too long or unhealthy, so they bite their feet to trim their nails. If your cat has a habit of biting its feet, try providing them with appropriate toys to meet their play needs and giving them adequate attention and care.