FYI, MANY PEOPLE ARE NOW USING BURROS FOR GAURD ANIMALS. ANOTHER USEFUL CHARACTERISTIC OF THESE GREAT ANIMALS IS THAT IN SMALL ACREAGE AREAS THEY WILL CLEAN UP ANY GRASSBUR PROBLEMS YOU MAY HAVE IF ALLOWED TO FORAGE FREELY.

What makes burros good as guard animals?

They are known to kill coyotes and wild dogs. Llamas will do the same thing but I dont know about them with grass burs.