Cat shelter cats

The second and fourth pictures, they have immunodeficiency problems. The others are older and really lonely so their smiles are the happiest thing to see cuz you know it'll be ok 😢 I saw a cat being dropped off; the owner was crying and the cat was crying. My heart shattered into a million pieces; I just wanted to quit and go home... but it was why I looked into volunteering, cuz I used to just pet them (edited)