My theory is that Pete has a wife named Leslie and 3 puppies. Pete always forgot the names of  the puppies so they just called them Uno, Dose, and  Tres.  What we really know is that Pete was put in a field all by himself.  I think that person took Pete, Leslie and the puppies. Luckily I think they escaped and never saw Pete again.  Now Pete lives with my family.  He has been with me my whole life. He's like my body guard.  He gets as much belly rubs and cookies as he wants these days.  Pete has the happiest home!!!