ACK! I don't know what the appeal of rolling in cold mud is. Nice, dry dust on a hot day would be different. We're into our second week of temperatures 10-20 degrees below normal, but they promise that we could warm up into the low 20s next week. "Global warming", my ass.
Oh, and Marl makes custom horse coats and blankets as a sideline. If you're intersted, let me know, and I'll get you a good deal.