That word "elderly" is so subjective isn't it? When I was 40, I thought 60 was elderly, now that I'm 67.....and a half, not so much.
Well I’m nearly 50 so 80 is a good place to settle on elderly.
Last time I was in the upper peninsula we ended up next to a couple in their 70s in the campground. It was one of those good weeks with great company. The guy was a rebel and a rulebreaker. His dogs couldn’t be off the leash in the campground so he had one of his dalmatians trained to walk the other on a leash.