The whisker Box is designed to respond to the scientifically proven feline desire for compression (called compression therapy) which translates to a sense of calm and security forour pet. Tips: Place box in an area your pet already likes to sit or sleep. Your pet may not get in the box right away Give it time! Even if your cat seems too big for the box, again give it time! Its all about compression and even big cats will enjoy squeezing in.