A rich old woman was visiting Mexico when a small ugly dog approached her on the sidewalk. She couldn't resist his sad eyes, so she took him back to her hotel and fed and bathed him. For the remainder of the trip the lady and her dog were inseparable. When the time came to return home, she smuggled the small dog over the border so she could keep him. Within a few days he got sick and she immediately rushed him to the vet, but there was nothing that could be done, he died in the office. After she stopped crying, the grief-stricken woman asked the vet what kind of dog he had been. The shocked vet looked at her and said: "Lady, that's no dog, it's a Mexican Sewer Rat!"