I am trying to export a model that I made in Blender, so I can use it in a Three.JS project. I have attempted to use both Blender 2.8 GLTF Exporter that comes with 2.8, and Blender 2.79 GLTF Blender IO exporter. Both end up with a similar outcome, depending on what settings I choose when I export.
When I choose "Skinning" as an export option, my animation (Gallop) is applied but my model is deformed. (See pic)
In Blender, I use a simple armature made up of bones, and animate over 20 frames. Nothing crazy, but I'm unsure if there is anything I need to do in Blender before exported to ensure the animation/model remain in tact.
To note, the horse's saddle and pad are separate objects, which I have parented under my Horse armature. I did this because I wanted them to move slightly when the horse gallop animation occurs.
I've attached a few screenshots and my blend file is below. Does anyone have any suggestions to help me get this model exported correctly? (At this point, just getting it to work in the GLTF Viewer is enough)


blendfile is dead...glTF(with default settings) and imported it into gltf-viewer.donmccurdy.com. Everything looks fine. Can you try it with a fresh installation of Blender 2.8?