
I start very early with my home bred pups, every time I picked them up for what ever reason after they were on their feet I would put them on a table with rubber mat, starting with computer table and progress to TV dinner table in front of a mirror hanging low on the wall[ regularly cleaned of nosey marks] so I could see their "judge side" of the dog.
To start with they will wander about very gingerly, look over the side at the others and naturally stretching out their back legs as they tend to lean into their front for fear of falling if they move the legs, later with a treat you can get them to lift their head to the right level whilst you place their feet if needs be, as time goes by they start to position themselves as soon as their feet hit the table, by 12 weeks they are stacked with just me holding a treat, they just need to master the leash and floor exercises which never seem to progress so quickly, too many distractions at ground level I think.
I think I will keep a video diary next time as it has been mainly stills with past litters and being here alone it isn't easy to hold the camera and pup at the right distance and angle to get what you want to see.