Finding Free or Low Cost Veterinary Care in Southern California?

My Newty is 11 years old. She's the oldest of two cats and she has an undiagnosed lump on top of her rear end. It looks like it has opened. She's on pain medication and antibiotics, because that's all that I can afford. I was told it needs to be removed, but I don't have the money to help her the way I should.

Can anyone refer me to a service or low/no cost vet that helps people that cannot afford a pet's medical bills? I'm simply not ready to let Newty out of my life. Thank you!

By Angie Comer from Pasadena, CA