The dog has good nights and bad nights. After a painstaking climb following her walk, she finally arrives on the landing at the top of the stairs and then tries to take another step, lifting her paw only to step on thin air.
Having done the same thing, I know exactly how she feels, that weird panic as you step through nothingness, the way the earth tilts a little even after you've found your footing again.
I feel a stab of sympathy as I realize she's felt like this for years.
One year ago: I've Been Wanting to be Nice to Someone All Morning
Two years ago: Firewall
Three years ago: Inspired
Four years ago: The Shameful Science
Ten years ago: Flea Market