Advocates for rodeo state that sick, injured, hungry, or severely abused animals cannot perform well in a given event. Rough stock must be healthy and well fed to give the cowboy a powerful and challenging ride sufficient to obtain a high score. The bucking strap has to be an incentive to an animal that already wants to buck off a rider, not a prod, or the animal will either flee the pain, not buck, quickly sour and refuse to work, regardless of any pain that might be inflicted. Steers and roping calves will not break from the chute fast enough for ropers to achieve a fast time if they are lame or weak, and because of size and weight restrictions for each event, they are not generally used for more than a single season.