Hi out there. I've been MIA for a long time but back to try to find an answer to my question. At what age/size do leopards usually learn how to go into their heated house by themselves? Of my four, only one female finds her way back in after they have been taken out for feeding,etc. The other three, including the male Humphrey that is a year older, still never go back in on their own. Will they ever learn? They seem smart enough about other things. Or, maybe they don't mind the cold weather here in AZ??? Would appreciate any input. Thanks.