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You can't forget the pets at Christmas. They probably don't have much idea of what's going on, but it's nice to involve them in the celebrations anyway. I think the cat I had growing up just knew it as "the time of year when there's a tree growing inside the house for some reason." Also "the day when they give me the extra special cat food that comes in the tiny can." I remember all he had to do was see that tiny can and he got excited. I don't really know what the difference is between the normal kind and that kind, but judging by his reaction the food in the tiny can was the really good stuff.