Animal cruelty and abandonment is a very real and tragic thing. The ASPCA is doing “some” part (as I believe they do selective euthanization – and are not a no-kill organization). PETA does a much better job at lessening tzar balei chaim.
For those not so conditioned to think animals are not just “animals”, if someone wants to work on behalf of animals, or someone wants to help animals, G-d bless them.