Ron S, you are very, very welcome.
Here’s another thought though that has been rattling around in my head. If you cannot take care of the child and the mother leaves, would it not be rational and humane to end it’s life? After all, it is destined to die for sure. You’d be saving it from the pain of having to starve to death or be eaten by wild animals, etc? I know it’s a horrible thought and the fact is, it would be something you would have to live with forever. But it’s not outside the realm of the right thing to do.