Need advice on the best way to re-train my 3yr old male on where it is OK to potty. The "weeds" behind our house where he learned to go will soon be someones back yard. We have tried "scenting the area" with pee and poo but he just sniffs it and goes back to the old spot. We have been guiding him to the new area with a leash and letting him stay for about 10-15 mins each time. Any tips or advice would be great!!!!