Complex sentence: They make good children's ponies, and are sometimes noted for having a "brave" character, but can be very opinionated or "cheeky", and can be impatient, snappy, and sometimes become uncooperative.
Split into simpler sentences: They make good children's ponies, and are sometimes noted for having a "brave" character. They can be very opinionated or "cheeky", and can be impatient, snappy, and sometimes become uncooperative.