Warning: This article contains images of animals that have been subjected to very poor conditions, which may be distressing.
If you willingly abandon a pet, you're among the worst people.
These animals trust you. They depend on you, they see you as family.
So naturally, people who work at animal sanctuaries and those who rescue diseased, wild or abandoned animals, are among the best.
As are the people who adopt animals and nurture them.
Their reward is the improvement in the animals mood.
Thanks to reddit, there's a before and after sub, dedicated to exactly this look.