Dog ordinance entered into effect on January 2015

 If you own a dog, this means that you are required:

•  to always keep your dog on your terrain. If your terrain is not completely fenced, you must use a dog run cable (of at least 10 meters long) or a dog run (of at least 2 meters high and 7 m²) for free movement of the dog;
•  to keep your dog on a leash outside your terrain;
•  to provide proper care for your dog. This means: daily sufficient and balanced food; drink water always available; shelter from sun, rain, and wind; and medical care of a veterinarian when needed.

Animal abuse, including dog fighting, is punishable as a criminal offense.
For more information you may consult the dog ordinance (in Dutch).