We ran an advert in the local paper last Thursday, and on Sunday received a call from a woman who lives in one of the trailer parks across town.  She said that she had seen Petey running around her neighborhood for the last 3 days or so.  We rushed over to look (Lucy had just been put to bed, so we got her up and threw on her robe).  I whistled like crazy and Toby talked to a couple of girls on scooters who said they had also seen him.  After an hour, it was too dark to continue, so Toby went back on Monday and stuffed mailboxes with the flyers.  Monday evening, I went back an whistled some more.

No luck yet.