Have you looked on your FB local selling site you might get one on there.
A friend of mine has used this stroller for her dog with arthritis. She had a Dutch dog called Friese Stabij...https://www.nvsw.nl/index.php?sp=126What about this one? Pet Stroller
I was looking at the three wheelers just thinking it would be more manoeuvrable on rougher terrain, like pushchairs.What about this one? Pet Stroller
Unfortunately not. Very picky I'm afraid.Are you on any dog groups on FB David?
(Apart from ours)
You could always ask about second hand buggies??

Thank you - very helpful.Everything you describe about Lady is how Sky was. The panting was when she was in pain. She lay around most of the day just watching us. The saddest bit was when she stopped greeting family when they came. We had to carefully manage her toilet routine and there were accidents in the house. Her back legs also used to give out a bit or she‘d stumble. We spent weeks preparing ourselves that the end was near and the day we decided was when we observed her struggling and both said we thought the time had come. I do get comfort from knowing we both instinctively felt the time had come and that comforts me now.
They look good and just the job. I wonder if the Dutch Expat Shop sells them. That's where I get my coffee from.There are buggy’s with large wheels, but are pricey....just for an example: Innopet hondenbuggy Sporty Dog Trailer DeLuxe Oranje (tevens hondenfietskar)..