This is the dog at the end of class
This is the dog after some white gouache work adding details all over (mostly lots of hairs). I added some of the dark here and there as needed.
I added a yellow glaze on the left side of the background. Then, after that dried, I added a thin layer of white gouache to the entire background. I meant to do that for you in class. The process is the same as glazing. I mixed up a puddle of white gouache and painted it wet on dry. The white gouache 'glaze' mutes the color, mutes the detail, it pushes the background back as it should be.