Going by what we've seen in Police Academy and Robocop, the police's motto is to serve and protect.
This includes pets, as this video shows.
A little dog was caught out on a motorway and was too scared to make his way back to the pedestrian side.
This cop, however, wasn't going to let the little fella get run over and marched out onto the motorway, stopping traffic as he went, to pick him up.
Good for him.