CW's First Bogus Theory of Cats...
Watching cat behavior over the years, I have noticed that they scratch not only to flex their feet and claws, they actually like to stretch their shoulders and back, using their claws as leverage. This stretching behavior will tip over a commercially available 'normal' sized scratching post.
Whenever I have observed one of my cats try to get a good stretch out of a standard cat post, it has moved or tipped and the cat has immediately given up and gone to find a more suitable object for an anchor - usually my sofa.
I have noticed that when my cats start scratching at the furniture, the pieces they choose to destroy have a few things in common:
1. They are stable and heavy. (I have observed that my cats always prefer a post that does not move when they dig their claws in and yank.)
2. They are wider than any standard cat posts. (My cats prefer a post that is wider than their shoulders.)
3. They are taller than any standard cat posts. (My cats prefer a post that is at least twice as tall as they are long. They like to reach up as high as they can and get a good long stretch.)
Eventually, I developed a theory, which I have dubbed CW's first bogus theory of cats:
Merely disciplining a cat for using the furniture as a scratching post, but not providing them with an alternative that meets their needs is not likely to be a successful method of training. A post that serves a cat's needs better than the furniture does will be naturally preferred for scratching, and it should make training the cats much easier, since they will not be deprived of stretching out and getting a good scratch in, when their physiology demands it.
So, I have created this tree-sized post, which allows a cat to flex their whole body, from their paws all the way to their tail, if they so choose. Also, it is tall enough to allow them to exercise their innate and instinctive climbing abilities, without wrecking the curtains or other furniture.