Running horse herds

I was thinking that a running animation could be added for horses. Basically it would only work for horses in a fenced in area and in herds of 5 or more. The animation would start with the fastest horse in the herd rearing up and neighing before taking off at a gallop and the other horses following. It could last for a minute or so and would add some nice visuals to a horse farm since you could look out at all your horses and see them running instead of walking a few steps and staying relatively close to each other.