Dog montage portrait

I guess I have been neglecting my blog!

I have been working on a couple of horse portraits both of which are now finished (I can't show them yet as they are birthday presents).
I have just started a dog montage portrait - it is of a beautiful Rhodesian Ridgeback called 'Kruger'. Sadly, it is a memorial portrait as Kruger is no longer with his owners. I am drawing him in pastels as a puppy, adult and old dog. Here is how far I've got: