Abram: Myself, Dana, I would first call authorities, and explain the situation, before attempting to enter someone else home without their permission. Perhaps a neighbor of theirs is supposed to be watching the dog when they are out of town. Maybe check that out first.
The neighbor is the one that called me. They know the situation. I've been upset because they keep her in the basement all the time. She has an autoimmune disease and can barely get up and down the stairs.