I haven't done mine yet, but I did put up a 3 foot tree with no ornaments to see what the puppy would do. He's already tried to attack my Rudolph and tried to eat another Xmas decoration, so I'm thinking the 7 ft tree may not go up again this year, LOL! He hasn't touched the small tree, but it's not very enticing without ornaments. I'm going to pull out some harmless ornaments (no glass) to see what he does!
He's 14 months old and still loves to rip things to shreds if he gets a chance. Luckily, no furniture, shoes, or books have been damaged in his puppyhood! He just loves soft stuff and paper, and the odd dryer sheet or two.
I also have the lights up on the outside of the house and some of the other decorations up.