The provisions of this subtitle do not apply to the following: Any person who by dispersal sale is permanently discontinuing the business of dairying, breeding, raising, or feeding animals. The part of the business of a farmer which consists of buying and receiving animals for grazing and feeding purposes and the sale or disposal of these animals after the grazing and feeding period. The sale by a farmer of any breeding, surplus, or unprofitable animal owned by him. The private sale, exchange, or transportation of any equine.