Noticed newly adopted 4 month (so I'm told) mini colt dragging back foot then taking step as if stepping on point of needle and then doing the same thing with other foot - jerking foot back up and then setting it down flat only to drag the toe again to begin next step. Both back legs/hooves are affected. He had an occasional 'quick step' with one or the other of his back hooves upon arrival. No heat, no soreness, no swelling I can detect. Picked up legs, carefully examined entire hip/legs and hooves and found nothing. Hooves need a little trimming - they are a little long and pointed at center of toe. He runs, rears, kicks, plays just fine with his little tail flagging behind - too cute. Shows no sign of illness otherwise. Still appears to be nursing on mom, is eating and drinking just fine. Coat is thick, shiny and soft. Can get no help from previous owner(s). Any ideas/help will be most appreciated. Thanks!