I wouldn't say this is necessarily so. Last year, a friend was riding my
gelding who is shod. I was riding my mare who has been barefoot all her life.
Both horses are agile as cats on hills. We had to ride down a very slick
hill,... it had rained thenight before.
The shod horse went down that hill just fine. My barefoot mare lost her
footing and she and I slid down the hill on our sides, my left leg under her
body. Luckily neither of us was hurt.