In canton Zurich the new cantonal hunting law came into force on January 1, 2023. This also includes a change in the dog law, which has also been in effect since the beginning of the year.
This change in the dog law affects the leash requirement for dogs: All dogs must be kept on a leash at all times and are never to be left unattended. This applies in the forest and close to (<50 m) forest from April 1st to July 31st.
This law already existed in the cantons of Aargau, Lucerne, and Zug.