It's the most wonderful time of the year...for pretty much everyone except cats. There are so many reasons why our beloved feline friends might want to Scrooge out during the holidays, and Lifetime's Grumpy Cat's Worst Christmas Ever goes a long way toward exploring them. Here are 13 other reasons why your cats might be feeling especially grumpy as December rolls around.


Related: How Aubrey Plaza Became Grumpy Cat