Oh boy! I am very pleased at what I have found to bring you today.
How about some vintage 3-D photos of people with dogs? I stumbled upon a site called "doubledogs," and found a page on "Doubledogs in history" - that is, a selection of stereoscope pix, along with some thoughtful text on most of them, apparently used as a teaching tool way back when.
There is a Belgian dog cart hauling milk canisters. There is Major, the Red Cross dog. There's a pet "helping" shovel snow. And a charming young sailor on a chaise longue with his dog (on the chaise!) and cat. There's more, too - click on the link and have a look!