00:04:00Violencemoderate
Petey the Cat, an orange supervillain, plants a bomb in an empty warehouse. Officer Knight and his dog Greg chase him. Knight cuts the wrong wire. The bomb explodes. Knight is dead from a head injury. Greg's body is ruined. In hospital, surgeons stitch Greg's head onto Knight's body. Stitches show on the neck. They name him Dog Man.
Theme. A death-plus-surgery origin is sold as a gag. Sensitive kids may only see a cop dying and a dog being cut.
What to say. You might say: 'The bomb goes off. They put the dog's head on the man's body so someone lives. If that is too much, we start when he is already a cop.'