UNDATED (CBS) -- It's a question every cat owner wants answered. Where does your cat go when it leaves home? One San Francisco couple knew that they couldn't follow their beloved kitty, so they scoured the web for technology that could.
Caroline Paul and Wendy MacNaughton are self-described crazy cat ladies. Although Wendy only became feline-friendly after a long ordeal, it began four years ago, when Paul's cat Tibby vanished.
After five long weeks, Tibby, healthy and well-fed, returned. But then Paul wanted to know where he'd been. Paul says, "I decided I was going to stalk him."
Paul and MacNaughton chronicle how they tracked Tibby in their book, lost cat. They found a GPS device online called the cat-track.
A map shows Tibby's tracks over a ten hour period. Paul says, "When I downloaded it I got this crazy Jackson Pollock like drawing on a map."
They switched to a video camera. But the footage made them seasick. So they went back to the Jackson Pollock-like maps.
By using Photoshop, Caroline and Wendy learned that Tibby was spending most of his time not very far from home. About ten blocks, down the street.
Since Tibby's cat capers, the gadgets have advanced. Pawtrack alerts you when your kitty goes beyond a certain area. The tag pet tracker displays your cat's coordinates on your phone.
But Tibby may go down in history as a pioneer in tabby-tracking technology. Paul says, "He actually passed away at the healthy age of 17."
Paul's current cats tend not to wander, but she has a plan if they do. She bought a drone.