If you have a horse that rears, you will know that it is very dangerous behaviour and, as such, it is important to know why your horse rears, how your horse learned the behaviour and what you can do about it to prevent it from happening in the future. Likewise, if your horse does not rear (great!), it is important to know just how easy it is to inadvertently teach your horse this unwanted behaviour and be able to recognise the behaviour patterns that can result in or lead up to, rearing.