Joanna, I am sure that is very frustrating, not being able to get help for that poor mama cat. We have some groups of individuals around here who have organized to trap, spay, and re-release feral cats so that they don't have to be killed but don't produce more unwanted animals, and some of the local vets give them discounts on spaying and local pet stores allow them to collect donations. Maybe you could look into or suggest starting a group like that in your area?

And I'm glad the clarification was useful. I hate the fact that the HSUS can use that name because it's so misleading and I'm sure many of their donations come from regular citizens who think they're donating to the AHA or similar organization.