Do you live in the city and have one or more dogs? Do them a favor and let them run through untouched nature (not during close time where birds and other animals have babies). There are forests and meadows everywhere outside the city. If your dog is healthy, hiking in the mountains is also a very healthy way to really strengthen his musculoskeletal system.
Since the first human beings appeared on earth, there has been the idea of a better place where everything is right. There is no evil there, the sun always shines...
