Puppies are learning the doggie door! We think it's important that even 7 week old puppies have the chance to potty outside (or close to it- if it's COLD!)- the training of a light weight doggie door has been started. Since it is so cold here they are navigating to dry litter to do their business on, instead of snow drifts!!! They seem pleased as they realize that the "door" moves! All of our families don't utilize doggie doors but it starts good habits early!