For safely containing donkeys, sturdy fencing that prevents escape and injury is essential. A well-constructed, solid fence at least 4 to 5 feet high is recommended to accommodate their size and deter jumping. Smooth wire, wooden, or pipe fencing are suitable options, as they minimize the risk of entanglement or injury. Barbed wire should be avoided due to the potential for cuts and abrasions. Regular maintenance to check for damage or weak spots ensures the fence remains secure. For specific recommendations tailored to your property, consulting with a veterinarian in Wickenburg, AZ, can provide additional guidance.