I've also herd it called Screw Claw from our vet. I've got a cow with it. As long as she's on rocky ground there is no problem but if she is on sandy soft ground long enough for the hooves to grow out a little they just keep on growing and will eentually start to curl. If you want to keep your cow you will just have to keep an eye on her hoof growth and if it starte to get long have them trimmed. Our vet has a squeese chute that tilts and works great for that sort of thing. We've only had to have her trimmed once, our ground is pretty rocky. I also have her daughter, who is 5 yrs old now and has great feet, she's never gotten long hooves.