Genia, don't feel bad. You did the right thing. It is sad that so many dogs are so mistreated but the only way to draw attention to the problem and get people thinking about it is by doing something.
The local kids feeding the pups is so brilliant but it is still no way for pups to be brought up. Your example will hopefully set seeds for the future dog owners among them.
You will never know if you saved a child's fingers, face or life but the chances are that you did.
Dogs living like that were not your fault or problem and you should feel proud of yourself for being brave enough to do something about it. Yes, it is sad but if people get away with it them more and more dogs suffer.
WELL DONE!