It depends. My horses are not shod, but I have to keep bell boots on one of them 24/7. The reason is she manages to injure herself just above the hoof when I don't keep boots on. After having bad cuts couple times I just have those rubber ones on her all the time. Definitely helped.
"Life isn't about waiting for the storm to pass: it's about learning to dance in the rain..."
"When we are no longer able to change a situation - we are challenged to change ourselves."
"How people treat you is their karma; how you react is yours."