Originally Posted by RedRoan
Depends upon the horse mostly I think. Also there is a huge affect of what you are doing with the horse along with what footing you have.
No it doesn't. If you had on a pair of sneakers, even ones with thin soles, and you lost one, it doesn't matter how well you adapt to it or how high your level of pain is - it effects you.
Loosing a shoe puts your horse off balance and effects not only his hoof but his shoulder and back. In the pasture without a saddle or rider, you can get away with it for a short time but not being ridden. You are better off removing the other shoe. Just because your horses doesn't seem to be affected by the loss of the shoe, he is.
BTW, the shoe that just came off will most likely have a twist in it from being pulled off so a farrier will be needed to balance the shoe and correct any damage to the hoof.