The smallest pedigreed cat is a Singapura, which can weigh just 4 lbs (1.8 kg), or about five large cans of cat food. The largest pedigreed cats are Maine Coon cats, which can weigh 25 lbs (11.3 kg), or nearly twice as much as an average cat weighs. Some Siamese cats appear cross-eyed because the nerves from the left side of the brain go to mostly the right eye and the nerves from the right side of the brain go mostly to the left eye. This causes some double vision, which the cat tries to correct by “crossing” its eyes. Source: RandomFacts