Here is my card design for this year sent out to a few furs and old alt.devilbunnies authors for whom I have a mailing address. Inside sentiment reads:
Pro-Christmas Decorating Tip:
Always check your trees for squirrels before setting them up!
Merry Christmas.

Based on a photo I found on an animal rehabber's blog from a decade ago about a gray squirrel they were rehabbing who liked to climb their Christmas tree.

May you and yours have a great Christmas or whatever holiday you celebrate this time of year.