Small dogs are known for being unruly and untrained, but this may be more of a reflection of owners being able to pick them up than their ability to learn. Many small dogs enjoy the structure and mental work training provides, and teaching them basic obedience isn't just good for their safety, it will make them better companions. Training your small dog to stay off the pool cover should be part of a balanced obedience training plan.
Before you can train your small dog to stay off the pool cover, you need to make sure he already knows basic obedience including 'come', 'sit', and 'stay'. Work through these commands first and take your time. You want training to be fun. Never train him for more than 15 minutes at a time, and always reward him for hard work and good behavior.
Below are three methods for training your small dog to stay off the pool cover. Read through them and try one or all. With some discipline, you'll be able to let him out without worrying what he's up to. Well, at least you won't have to worry about the pool!