Continued checking for signs and hoping maybe owners were out of town over the long weekend. Sadly, the park she was found in, is often used to dump dogs and cats. Its very sad, but there it is.
I will never understand this, even if I live to be 100.
I know. My Sammy (the cat in my avatar) showed up at our back door one morning. He was so healthy and so friendly that we were sure he was someone's pet out for an adventure. But after a while it became apparent that he was looking for a home. I always wonder who had him before and abandoned him.
Bless you for rescuing this little dog.