Field mowing....

Some friends of mine use llamas to take care of that issue. I have been watching them at work for two years and they do a wonderful job, aren't hard to contain at all and are large enough that predators don't mess with them. Pen the up for the first couple of days and they will always go back to that same spot to use the bathroom plus the feces don't smell bad. They are sure footed in rough terrain, they love their owners and other people that their owners introduce to them but do stand guard when strangers show up. They might blow a wad of snot at them. They sell pretty cheap around this area and I am planning on investing in a pair.

Llama Manure Benefits http://www.hidog.info/LlamaManure.html