On November 17, 2014 Cheyenne Mountain Zoological Park posted a memorial post on FB saying their Leopard Katia died of renal failure at 20 which would not be consistent with the Katya you mentioned (born 10/06/06) however in earlier posts from Cheyenne they list this same Leopard Katia as being born October 2006 so I have to think this is the same Leopard. They also say she mothered 11 cubs but I am only finding support for only one in the studbook, a female named Raina born 8/7/11 at Great Cats of the World in Oregon.