More than a quarter of a million people have logged on to see how Frank the cat is, since he got run over in January.
He's recovering from a broken pelvis after being hit by a car near his home in Trumpington, near Cambridge.
His owner, David Donnan, who runs an internet firm, decided to set up the website to test some new equipment his company was working on.
Send him get well cards
Visitors to the site can see how Frank is, send him get well cards and email pictures of their own pets.
Pet cams are the latest trend in America, where busy owners are setting them up so they can keep an eye on their furry friends while they're at school or work.