If you have the space, you can elevate your Cat Scratching Tunnel on a solid foundation. Do the Cat Scratching Tunnel by pushing down on the test base to make sure it will hold and don't just stack cardboard boxes for the Cat Scratching Tunnel as they will collapse.

The elevated base will give your pet the opportunity to jump into the Cat Scratching Tunnel, which is good practice if you are interested in training your dog to complete an agility course.
For cats, consider adding a large hole in the "roof" of the Cat Scratching Tunnel so they can not only walk through the space but jump out of it. Use scissors to cut a large rectangular opening on the side of the cardboard box facing up, making sure there is enough space for your cat to get out easily.
When cats are animals, they have always lived in desert areas in the wild, so there are many living habits that belong to their nature. And after they are brought into the family as pets, they have to cater to the human way of life, and there will be many problems. These problems are not the problems of cats themselves, but a standard that we want them to meet. So the right thing to do is to combine their natural needs to improve this dissonance. So it is necessary to use Cat Scratching Tunnel correctly at home.
Through the above introduction and analysis of the precautions for Making a Cat Scratching Tunnel, hope it helps you.