Nope wasn't a chihuahua. The shelter that he is at requested that we don't post a picture or description, that if someone lost their dog that day they can call and describe him. Apparently there are people that could try to scam a lost dog. Sad really.
I haven't gotten any responses. We put up flyers all over the neighborhood, I posted on craigslist, etc. Hope no one just dropped him off - since it was near the park knowing someone would pick him up! I really hope not, but naturally we always think the worst.