Update 10/27/19: Working on a total redesign to incorporate silicone in-soles and moving away from the glue-on concept to a fully removable proper hoof boot. Performed basic design testing and found some structural issues with the square hoof tread pattern. Going to be switching patterns and doing a lot of work on the design for the field test update.
Update 10/16/19: Figured out how to do the shaping of the hoof boots for individual horses. Big shout out to https://www.3dflow.net/3df-zephyr-pro-3d-models-from-photos/ for making it possible to convert videos of a horse's hoof on the ground into a full 3D model and then using a single maximum hoof width measurement to make this simple and easy.
Original Post: Work in Progress file for the Hoof Boot project. This is a bit of a different design of the glue on horseshoe. The idea is to only match the front angle of the hoof and attach to a sturdy center spike so that it's easy to custom fit using software.
Design is far from complete but I needed to make a file backup. If you are interested in making some of these let me know in the comments first as there is an entire process to custom size them, printing a set of default ones is almost certainly not going to fit.
There is also a known glitch in the file somewhere that makes it print incorrectly. Still trying to track down a solution.