The Sniff and Snack Wall is designed to be hung on the inside, outside of a dog crate or pen plus you can hang this up in the garden or in various places around the house. The Sniff and Snack Wall has different size semi circle sections that are angled randomly on the wall. By placing treats/Food in them you challenge your dog both physically and mentally as they have to work out how to get the treats/Food out. To start with we suggest that you lie the wall on the floor , place a treat/Food just in the opening of One of the sections and encourage your dog to find the treat. Reframe them from using their feet and digging at the wall. Once they have mastered the idea of the wall then you can hang on the side of your crate/ pen etc. Supervision is required. The Sniff and Snack Wall is not designed to be used as a tug toy. Once your dog has finished please remove from your dog.