Each dog has his own way. All three are allowed in the backyard unsupervised unless special conditions prevail. They are independent, certainly do not need minute supervision all of the time.
When each is ready to come in, each has their own way of announcing it. Achilles scratches the door and when it is opened, makes his graceful, slow way in. Both Kendal and Stella bark. Just once. When the door opens, Kendal comes right in, and that is fine. Stella typically (though not always) waits until given the release. Knowing each dogs’ ways makes it easy to set each one up to succeed.
previouslytexan 
i love dogs