How to make part of a mesh invisible, preferably without separating the mesh?

I have a rigged 3D model that has a "Body" mesh. If you hide "Body" mesh then the whole model disappears. I want to hide just the feet, but it doesn't have a separate "feet" mesh so I can't just make it inactive in the Inspector.

Is there a way to make just the feet invisible anyhow? Preferably entirely within Unity rather than having to do some Blender work which I'm scared will corrupt the model's rig?

Thanks!!

Edit: I *have* found success in reducing the feet bone's scale but that's not going to work for my purpose. Need it keeping its scale, but hidden

 

You can use a cutout shader and the alpha clipping value to make some part of the mesh invisible, based on the alpha of the texture.