Hannover, Germany. 26th Mar, 2019. Cajus, a nine-year-old Labrador retriever, has a blue dog leash. From 01.04.2019 dogs have to be kept on a leash in many places in Lower Saxony. During the so-called brood and Setzzeit, the quadrupeds may not run freely approximately in the forest and on field-paths. Credit: Christophe Gateau/dpa/Alamy Live News - Stock Image