BabyTex,
The number one thing with any white, you have to keep there pen clean. The kids pick the pens just like you would a horse stall. The cleaner you keep the pen the less likely you are to get dirty. Kleen Sheen after washing will help keep the dirt from sticking. ONce a calf becomes accustom to being washed in cold weather their body adjust. You have to get them dry fast in cold weather. Most of our calves have a pretty good coat right now. The more you brush the more the natural oils will be secreted and it also helps remove dirt. I am old and my bones ache. I always try to help wash in the winter so, I built a heated wash rack. Not everyone has that luxury. It was the best investment I made.