When I was young we had a family cat who, as a kitten, climbed the tree. She brought the whole thing over and really frightened herself. She decided on her own not to climb it again. Every Christmas for the 21 years she was with us she slept on the packages under the tree. We made a special one big enough for her to snooze on each year and positioned just right so she could see what was going on in the house from her roost.