You shouldn't ignore an abusive pet owner.
Darren lives next door to Rob who owns a dog, and Darren hears Rob screaming and the dog yelping in pain.
Darren wants to find out what's going on next door.
Darren knocks on Robs door and is told everything is fine, and Darren doesn't believe him, so he calls animal control who take the dog from Rob.
Darren knocks on Robs door and is told everything is fine, and Darren doesn't believe him, but still chooses to do nothing.
Darren saves the dogs life and finds out the dog has a new owner who treats him kindly.
Later that night, Darren hears the dog in pain again and finds out the next day the dog has passed away.