This is NOT a movie for someone who is hoping to see something uplifting or cute or dogs in a funny movie. This is a VERY black comedy. So black it is, most of the time, very dark and depressing.
It is neither "lethally funny" nor "Hilarious" as it is rated on the outside of the DVD case. It is also not riotous (unless you are the SPCA).
The dog is the best thing about that movie and even then you will see the dog being neglected and even killed (just warning you).
Definitely NOT for family viewing.