My dogs are secured in crates or the bedroom (Rotties were okay behind a gate, I'd never trust my basenjis with one) if the door is open. Every time, every single time, for my entire adult life. So yeah, dog bolts, the person failed to secure the dog. Unless some person enters if you don't know it, tree falls on house, burglar comes in, police raid your house by mistake etc… if YOU open a door, YOU are responsible, not the dog.
