We had to adopt our daughter's dachshund, a rescue she had had for 10+ years and he became diabetic (had to give insulin injections twice a day) and blind. He was very happy, but reluctant to go on walks, which he previously adored, because being bling made him scared.
We were about to go on a holiday in Tuscany, meeting up with friends for UK, and I realised I could not carry him all the time visiting all the hill towns. I didn't tell OH as I knew he would go mad- but I ordered a dog pram on line. It was not expensive and he totally loved it. OH swore he would pretend he was not with me- but fortunately our UK friends are true dog lovers and were happy to help push him around, and OH actually said it was a great idea.
Everywhere we went he was the star attraction, and every tourist and local came to say hello- he had his photo taken 100s of times. We continued to use it here until he had a bad stroke a couple of years later and we had to say goodbye to Slinky.