Off of a vet site, it is titled Hazards of Christmas on Cats:
I wonder if cats ponder the meaning of Christmas. In the middle of winter we bring a tree into the house. That's strange enough from a cat's point of view, but then we hang lights and all sorts of stuff on this "giant cat toy" and get mad at them when they dare to play with it.
Donna, one of my employees, said they have discovered a great solution to the problem of cats knocking the tree over. They nail it to the floor. It's not as crazy as it sounds if the tree is on a carpeted area. Small nail holes will not hurt the carpet and won't show when you remove them.
I thought we should hang our tree from the ceiling. The cats would like that even better, since they could swing back and forth on the tree. It would also be safer since the electrical cord could come from the top, where the cats are less likely to chew on it.
Cats love to investigate new things and the electrical cord to the Christmas tree seldom escapes their attention. We usually get at least one feline patient who gets a burned mouth or worse. If you don't want to hang your tree from the ceiling, keep a close watch on the cats, unplug the tree when unsupervised cats are around it, and consider using the plastic tubing hardware stores have for covering electrical cords.
A pretty Siamese mix named K.C. had to come to the hospital yesterday. In an unusual display of Christmas spirit, she was wearing a bright red decorative ribbon - protruding from her rear end. Cats will also eat tinsel. We stopped using it several years ago after our old cat Amos interrupted our quiet evening in front of the TV. He came screaming through the living room like the devil was after him. We tracked him down, hiding way under the bed, eyes big as saucers. We found a little nugget dangling under his tail by a bright piece of tinsel.
If you should discover ribbon or tinsel in a similar place, don't pull on it. The stuff may be longer than you think and if you pull it out it may slice through the wall of the intestine like a little wire saw. Be careful with your scissors, but keep cutting off what hangs out until no more comes out.
The intestine may bunch up on string-like material and cause a gradual partial obstruction of the bowel. Symptoms like vomiting and loss of appetite may only develop slowly over several days or more. It is safest to take an initial X-ray and then watch the pet carefully for signs of trouble. Surgery may be needed, but it is a difficult diagnosis to make and having an initial X-ray for a "baseline" reference could be valuable.
Poinsettias are toxic, but rarely cause serious trouble. As in most plant poisonings in cats, the most common symptom is drooling due to irritated gums and the only treatment that may be needed, if any, is rinsing with water. Holly and mistletoe have the potential to be much more toxic. They can cause vomiting, diarrhea, nervous system symptoms, and heart problems. But it is rare that a cat will eat enough of either to get seriously ill.
Well, I couldn't talk my wife into hanging our tree from the ceiling but I would like to hear from those of you who try it. When she hears how well it works out, I'm sure we'll do it next year.