Dog’s can be so amusing and entertaining! This one looks a bit sad, but certainly more than willing to do whatever the master wants. Actually there are many dogs that thrive on this kind of stuff, you know, playing dress up etc.
I had a German Shorthair Pointer several years ago. She was a wonderful dog. So smart and willing to learn and please. They are great dogs!
I would like to mention here too, that the underpainting process is very helpful in these animal portraits. Sometimes one may want to be freer, but in general, it is very helpful to get proportions right early on.