Teacup dogs generally have a lifespan of **12 to 15 years**, although some may live longer with proper care. Factors influencing their lifespan include genetics, diet, exercise, and regular veterinary check-ups. Teacup breeds, such as Teacup Poodles or Teacup Chihuahuas, are particularly delicate, so it’s essential to provide them with a safe environment and avoid overbreeding, which can lead to health issues. Proper nutrition and routine veterinary care are crucial for their longevity.