This movie is a metaphor of a trap in life. Like a bad relationship, or a parasitic mother, or girlfriend or boyfriend, or a job, or a place. You suddenly realize that you cannot escape, you are trapped. Every detail should be seen as a metaphor, not literal. Not a literal dog, not a literal caw, not a literal crow, not a literal second house. Remember, generally metaphors are false in their literal meaning, so do not try to negate it. A metaphor can only be negated with another metaphor.