MTG, works wonders :) I use it on my broodmares after babies have destroyed their tails using them as pacifiers (have yet in 30 years found something that keeps them from chewing them!) My mare that had a foal last year and isn't having anymore had hers pretty much chewed off to her hocks...I've used MTG on her weekly since the foal was weaned and it's to her fetlocks now :)
Fair warning, it is some foul smelling stuff, wear gloves! It kinda smells like a mix of sulphur & smokehouse bacon. ICK.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.