Small dogs may benefit from dog training collar, which provides pain and shock to control bad behavior. They can easily use a remote-controlled device with both a shock and a tone feature. Although these collars come with a range of up to 75ft, you should use one that has a 30-50 ft range, as your small dog might jump over these ranges, especially if he's young and energetic. These collars come in different shapes and sizes, and you can find ones that are suitable for your small dog and size.