Many people like to go out the day after Thanksgiving and grab their Christmas tree, so they have a full month to enjoy it before unceremoniously chucking it in the trash the day after Christmas.
But the problem with having your tree up for that long is your pets have a full month to plot how they're going to climb, shred, pee on or otherwise ruin your beautiful tree, leaving you with a new project- protect the tree from your a-hole pets.
Sometimes a simple fear-based deterrent will work, like surrounding your tree with vacuum cleaners (preferably ones that are plugged in and ready to go), but depending on the pet you may have to go to extremes to protect your tree.
See 15+ Genius People Who Found A Way To Protect Their Christmas Trees From Cats And Dogs here