Then there's the recent wussification of horses, from wild western horses that'd charge around carrying gun toting hoodlums of all sorts, to the present day where they clop slowly along the road where you have to pass wide and slow on the offchance that you'll totally freak them out.
Even military horses aren't much better. A pile of bricks fell over in London a few weeks ago and a bunch of guards' horses threw their riders and galloped across the city in blind panic. I bet the ones that carry those dual timps are taking the right piss out of them back at the stables.
Evolution means "Survival of the fittest". In English we use "Fit" when we mean strong or enduring. This is very wrong in the scientific context where the word originates.