This heavy muscling should also be evident through the chest, forearm and gaskin. Limbs Set and quality of the legs is important and should be as nearly correct as possible. Bone and joints should be large, but as clean and flat as possible. The feet should be deep, round and large with evidence of good wearing qualities. While some Mammoth Jackstock are naturally fairly sluggish, action should be straight and level with as much alertness and style as possible.
Good action is correlated with quality and proper conformation.
Sluggishness and dragging of the feet should be discriminated against. Proper proportions, conformation, balance, symmetry and refinement are qualities to be looked for in every type and size of donkey. Grey donkeys often have dorsal and shoulder stripes that are black, brown or dark grey, usually the same color as the mane. True Mammoths rarely have dorsal and shoulder stripes. Black and brown are the next most common colors.