I only watched about 1/3 of the way into the movie, having become increasingly convinced that these two lackluster narcissists would never get their lives together enough to go rescue PawPaw before he was due to be euthanized. I see from the above comments, that I was correct.
These vapid, unlikeable human characters are so totally entangled in their own narrow universe, it is not surprising that they failed to venture into reality long enough to even do something as simple as to rescue and love a kitty in need.
PawPaw brought more life, love, introspection and awareness to his short, jailed existence, than the humans managed in 30 days of supposed "freedom". PawPaw's key to a meaningful existence, is being READY to love others as he travels once through his unique bubble of life-time - and not just being enamored with one's solitary self.