I brought my yearling in yesterday for some training and grooming. I managed to go through my old horse's grooming kit and sort it out so I could use it for my yearling's stuff. He inherited some items from my old horse, and I put the few items he already had into the box.
I felt a bit weird bringing the box out to the crossties - somehow the box still isn't my yearling's kit yet. I still look at it and think of it as belonging to my old horse.