You will find if they are willing, able and safe enough for the intended use. Be sure their immunizations are current and that their feed is adequate. If possible offer pasture for your stock. No environment is as good for mules as abundant pasture with good shade, clear water and an appropriate salt and mineral feeding program. It not only improves strength, soundness, agility and endurance, but it creates a psychological environment that results in a happier, better-adjusted mule.
Mules overheat only in extreme temperatures and when overworked.
When walking in high temperature it may rise to 120 per minute. Rest is indicated. If 104 degrees or higher they may die of overheating or dehydration. The two-volume set contains material supplemental to the information found on this site. The books are available through Extension Publications.