Cats in Sachsen, Germany: rules and travel
Saxony's state law covers dangerous dogs only; there is no general register, chip, insurance or Sachkunde duty for ordinary dogs. Leash rules and dog tax are municipal.
The Gesetz zum Schutz vor gefährlichen Hunden covers dangerous dogs; general rules are local.
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.