• Lost dog? As of next March, pet owners will be able to drop the photocopier and staple gun and pick up the phone instead. That's when PetCell, the first cell phone for dogs, is due to hit pet-store shelves. Hung off Fido's collar, the PetCell is a bone-shaped cell phone that will let dog owners talk to their best friend over a two-way speaker. Developed by PetsMobility, the PetCell works with standard cellular networks and has its own number. It automatically answers when the owner punches in a code on their telephone keypad that means, "Lassie, come home!" The PetCell will ship in early 2006 and will sell for $350 to $400, the company said. President Cameron Robb said he