The dog story

A person asks his friend if he can watch his do over shabbos. The person says that fine and he takes the dog. When the person leaves, the person says leave dog, leave. and the dog just goes in the kitchen. the friend comes over Motzay shabbos, and the dog is dead. The friend gets angry and takes him to Bait din. The judge says  did you neglect the dog or not, the person says,"Im sorry.........I neglected the dog and he died. The judge says he's chiev. and thats the end.