Farmer goes to market

A farmer and his new wife took there wagon into town one day.
He had a horse tied to the front to pull and a horse tied to the back
that he just bought from the market. The lead horse pulled over to the side
and started eating grass, the farmer sighed to himself got down and walked over
to the horse lifted it by the reins and said "Thats one." Then he go back into
the wagon and started on there way home again. A second time the horse stoped by
a stream to drink some water. The farmer got down again lifted the horse by its
reins looked it in the face and said "Thats two". He got back in the wagon and they
started out again. The horse stopped for a third time and the farmer got out
walked over to the horse lifted by the riens and said "Thats three." Then he shot the horse. He went back to out the other horse up front, when he got back into the wagon his wife started yelling at him "Why did you do that, it was a perfectly good horse, i cant believe you'd shoot him like that." The farmer raised his finger to his wife and said "Thats one."