Cats love to hunt, stalk, attack, chew and absolutely destroy feathers. One of our epiphany moments came when we noticed that our feathers stayed in the tubing without glue. We could adjust them, add/subtract feathers and replace them when they would eventually meet their demise.
Our kitties love to attack and chew on the feathers and with cork & feather cat toys you can simply replace them. We offer a "build-your-own-bird" feather kit as well as a monthly feather subscription service where you get a fresh tube of feathers every month.