Puzzles For Dogs Diy . Any apple will do, but if you have a great, big dog, avoid tiny apples (choking hazard). Make around 10 cones and put them in an old box. So many awesome DIY Dog Puzzles. Doggie Treats Pinterest Dog from www.pinterest.com The more holes you make in the bottle, the easier it will be for your dog to get the treats. Then fold the towel longways across the treats. Drop in a couple treats and fold over one side to close.