You are right horses, mules and dogs are not born bad. Most are the product of their training. Not evey horse will make a good cowhorse but with proper training should be gentle and rideable. Genetics plays a large part in weather a horse will be an athelete or not. For a mule to be one will have to come from his mothers side, cause his dad was built to pack , pull or Barbeque. Burro ain't bad in a taco .
