Everyone knows when your horse stops on the trail to eat grass- its because they need to refuel-- they need more energy!
When my hubbys horse goes poop on the trail he says its cause 'he needed to loose a few pounds so he could walk faster'
When I bring new non horsey people around the horses-- the horse poops-- I say 'its because you scared the crap out of them' lol.
Heres my famous excuse-- 'My horse isnt stubborn.. she just forgot how to neck rein.. and she doesnt like this bit.. or hackamore.. or halter'
When one of our mares 'forgets' her ground manners-- its because she gets crabby when I don't groom her first! Lol.