I took him to the vet this morning. I thought maybe he escaped from their boarding facility.

My vet didn't recognize him and said he is a healthy boy. He weighs 5.8 pounds and is not microchipped. I can't imagine someone not missing him but there have been no calls.
I agree regarding the harnesses and think I will get one for him. He's a tiny guy and I wouldn't want to hurt him. I also agree on collars and need to get one for Max....just can't find one locally that I like!
Thanks for the help!