These organizations have particular criticism for "piales" and "mangana," the events that involve roping of horses by their legs. They claim that the horses used will often sustain injuries, including broken bones and teeth, dislocated joints, and lacerations. The distinction claimed between Manganas, or horse-tripping, and events that rope cattle, such as calf roping, is that the high center of gravity of a horse, the longer legs and faster speed of a horse creates greater potential for injury, whereas cattle are smaller, have a low center of gravity, are slower and have sturdier limbs. There are additional concerns that horses are underfed and overused, repeatedly roped until lame, with rope burns down to the bone.