You can hand wash or use delicate cycle in my humble opinion IF you have a newer washer WITHOUT the agitator. The older style washers with agitator can pull on the wool and make it shrink. Most wool manf will tell you if you have any heat, water, or agitation in combo you have the chance to shrink your wool.
I would rather hang it out to simply air out and brush with a good stiff bristle brush for mud. If it is indeed bloody, then hand wash or as gentle cycle as your washer has, then hand block to shape and air dry. Wool does not need to be washed in my book unless it is bad bloody.
nocams