Maine Coon Cat

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 feline, who at 20lbs (9kg) could claim to be one of the world’s biggest cats, is only half grown and set to gain more weight.

The giant breed Maine coon is only half its possible size at nearly three years old, and is expected to put on another 11lbs.