I volunteered for one full year at the MSPCA (kill shelter) It is very stressing. I stayed because I felt sucked in to every meow and purr. I fostered a total of 16 cats, and kept 6 for myself, and 4 crossed the RB. Its very sad to see dozens of innocent litters killed simply because of no room, but you cant save them all. I volunteered 40 hrs a week for a full year, so I knew everything that was going on. It is very rewarding when you save a life, but stressful when approx. 10-30 cats are put down a shift. The next week you think "Fluffy" was adopted, but it turns out he was killed. You cant save them all. I am torn between saying go for it and saying save the heartache. It's good to have folks like us volunteering at those places because we give out love no employee could ever give and those cats deserve that. After a while it hardens you and you get used to seeing the innocent ones go, just please be cautious and don't lose your mind like I did. Overall, except for rescuing my cats from death, it wasn't a very good experience.