This is Fiona, aka "The mama", my great Dane.
She is called like that because a year ago she had puppies and the name stuck.
She's four years old and, as a great Dane she is already having hip problems and back issues. The vet recommended some exercise for her, so we went for a long, quiet walk.
At night, she was done. But really done. I put on a blanket on her and she fell asleep immediately.
Any way, 17k steps is not bad. I didn't make all of them with her, but most of it happened together.