I have the great good fortune of having a dining room with French glass doors. The tree goes on my oversized trestle table. The cats are allowed to "supervise" the decorating process and to be in there if we're home. They have been very good.

I see a lot of people use tinsel. I don't because, like any stringy substance, can damage the intestines if swallowed. I don't want to deal with decorated kitty backsides, either.