It all started on a Tuesday night, when I came home from work to an unmistakable absence. My brown-and-white pit bull mix, Maizey, wasn't at the top of the stairs to greet me. Instead she was in her bed, shaky and confused.
When I tried to get her up, she stumbled, nearly falling over while standing still. Walking to the vet, she leaped like a puppy chasing imaginary balls.
Later, at the 24-hour veterinary clinic in San Francisco's Mission District, the staff ran some tests and determined Maizey was in no immediate danger.