Dogs can naturally swim, even daily to strengthen their musculoskeletal system or if they have problems with moving. Look for a lake near by. If you don’t have any options at least spend a vacation next to a lake. For example at the Garda Lake in Italy you can enjoy dog beaches and swim with your dog if you like.
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...