Why 'Little Brown Dog, Big Green Sofa'?

Where did the name originate?

For many years George's writing companion has been a feisty miniature dachshund named Jenny. Unlike many authors, George chooses to do the majority of his work in the common area of his home. This allows him to be around his wife and two children as he's creating instead of being locked away from the action in a darkened study. Early on, the family dog would nestle up beside him on the green sofa as George did his work. This tradition has continued through four novels and numerous short stories. Jenny is always 'at the ready' for wherever the next story takes them.