MO HB1921

Establishes the "Puppy Mill Cruelty Prevention Act" requiring dogs kept for breeding or sale to have adequate housing, food and water, shelter, veterinary care, regular exercise, and rest between breeding cycles

Limits ownership of intact dogs over four months old to a maximum of 50 dogs when used for breeding or raising puppies for sale

Defines specific standards including enclosures at least three times the dog's length with solid or nearly-solid flooring, environmental temperature between 50-85 degrees Fahrenheit, and at least one hour of daily exercise

Exempts veterinary treatment, transportation, retail pet stores, and humane organizations from the requirements

Establishes violation as a misdemeanor punishable by a fine up to $1,000, imprisonment up to 180 days, or both