Koopertox works the best for me. Clean the hoof as best as you can and then spray it on and above the hoof. Do it a couple times ro more in a week and keep giving pen. Should clear up in a couple weeks. As for soemthing to keep a heifer I would stay away from anything with heatwave backround. Many do not milk, and many will have calving issues going back to another bull. Sunseeker, WMW, Ali make good mothers. I also am really imressed with my Ground Zero cow and some Lucky break sim cows I have as well. Plus if you stay away from heatwave as a cow to keep you can always breed her down the road to heatwave or heatwave sons.