Normally a horse's chestnuts will slough off or peel off as needed; however there are those (namely older horses) who will grow really long ones, and they may need 'trimming'...you can either peel them off, or snip them off using a hoof nipper. Some farriers will do that for you if needed. Or you can rasp them, as well, just be sure not to hit the horse's legs with the rasp, or file too far!
I don't generally pick at the chestnuts unless they are really long, and seem to be causing the horse an issue.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."
Last edited by mom2pride; 12-31-2009 at 12:22 AM.