An easy keeper, easy doer or good doer is a livestock animal that can live on relatively little food. The opposite of an easy keeper is a hard keeper, an animal that is prone to be too thin and has difficulty maintaining adequate weight. Easy keepers tend to be found most often in breeds originally developed to survive under harsh conditions. Most pony breeds are easy keepers, and smaller, hardy horse breeds such as the Arabian or Mustang have many representatives with this trait. Many draft horse breeds, such as the Percheron are also easy keepers, as are most mules and donkeys. If overfed with a too rich modern diet, the easy keeper is prone to obesity and other health problems, including laminitis and metabolic disorders.

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