Do not use the Medical Hoof Boot (MHB) in place of an overreach boot to prevent shoe loss. The MHB is not designed for this application and will not protect against overreaching.
If your horse is inclined to overreach, or stands on its own hooves, then an overreach boot should be used over the MHB to protect both the horse and the MHB from damage.
Measure, Measure, Measure?
The MHB is designed to be a snug fit so it doesn?t fall off. If you do not measure accurately or buy a size too big it can result in damage to the MHB due to the boot being trodden on by the other foot.
i) Measure width carefully before bandaging, with or without shoe
ii) Choose size per guide (don?t go to next size up)
iii) No need to add extra for dressings
(source: Woof Wear)