The Biggest Domestic Cat in the World?

At three times the size of the average cat, most would think giant pet Rupert has done enough growing for now. But the super-sized 20-pound feline could claim to be one of the world's biggest cats. Rubert is only half grown and is set to gain more weight.The giant breed Maine coon is only half its possible size at nearly 3 years old. He is expected to put on another 11lbs.

Where does Rubert want to sleep? Hmm...
Source: http://www.dailymail.co.uk