Should a person be prosecuted for property damage when committed to rescue the property owner's pet from harm or death?

Recently, I heard a story about a man who smashed the window of a stranger's car in order to rescue a dog left inside. It was a very hot day, and the dog would have died or suffered brain damage if it had not been rescued. Was it moral for the man to do this? Should he be charged with criminal damages for smashing the window? Should the owner of the dog be charged for leaving it to die in the car?