Does your cat mess with your Christmas tree?

The one problem we had this year was that my cat (who was only a kitten last Christmas) decided to eat the Christmas tree. It was a real tree and made him quite sick. He was vomitting a white foam for two days and not eating. He was also a little grumpy. But he was drinking water and doing his business as per usual. So I continued to watch him. He got better after 2 days and started eating again. I read online that Christmas trees are toxic to cats. The needles can also do damage inside their bodies. I guess I'm lucky my Frank did alright. But next year, we are going to have to be more careful.