Cats in Saarland, Germany: rules and travel
Saarland's Polizeiverordnung covers dangerous dogs only. No general register, chip, insurance or Sachkunde duty for ordinary dogs was found; leash rules and dog tax are set by the city.
The state Polizeiverordnung covers dangerous dogs; leash rules and dog tax are municipal.
The national rules for Germany apply here too. National rules
Laws change: this is general information, not legal advice. The authority linked on each line has the final word.