Himmy was a neutered tabby. He was actually a tabby-and-white. He belonged to Thomas Vyse of Redlynch, Cairns, Queensland, Australia. Accoding to the Guinness Book of Records he weighed 46 pounds and 15.25 ounces. This is 21.3 kilograms. He died of respiratory failure aged ten in 1986. As I recall Guinness world records no longer do these sorts of records as they encourage poor behavior in cat owners in trying to win the record.