I Googled dogs' toilets but they are to small for ,as Fleurpepper observed an older dog although a p;up can be trained to go on a special small surface area.
My small garden would have an area perhaps about 6 feet by 18 feet. I wondered if turf is the best surface for cleaning up and picking up.
I'd like the whole garden to be turfed, but in my experience with an active dog and a large garden, much of the turf become mud for about three months in the year. So much as like grass, I thought, in a small garden, concrete slabs would be good for the dog's ball games, his wee paws, and I could plant some low bushes for the birds and bees, and some greenery. It's only the problem of toileting surface on the smaller toileting area that is a puzzle. My dog already has a preference for certain areas in his garden so that is not a problem.