Murphy is still here. The owner hasn't called back. I left another message last night. I called the vet clinic again to see if they have an alternate telephone number, but they don't. He is not in the phone book. The clinic can't release the owner's address, of course. They confirmed that it is an address in their town, not my town. I'm not sure what that means.
I called the nearest neighbor with dogs in case maybe he was dog sitting, but nope. He seems to think he saw Murphy at their place last weekend though.
Murphy can shake hands, but won't down on command. He is content to sleep on the rug I put down for him in the kitchen. He has an upset stomach, and won't eat the dog food I offered. I cooked up some rice with vegetables in beef broth, and he seemed interested in it, but won't eat.
I've been working on getting some burrs out, at least on his body. I'm not messing with his feet or tail.
I really can't keep another dog.
Edited to add: Nope, he can't stay here. He just tried to kill Mr. Rooster, aka Big Daddy. I tried to get into the coop without letting any of the chickens out, but the big rooster and the baby rooster escaped out of the coop. Luckily, he released as soon as I screamed at him, I think all he got was a mouthful of feathers. I was able to catch Big Daddy, and he doesn't appear to have any wounds. I don't know where baby rooster went, I hope he'll come back to the coop once he settles down.
I also learned that Murphy knocks on the door when he wants in.