I had a kudu mount fall off the wall due to a crap backing board and it split a horn down near the base.

Can anyone recommend a glue to fix it?

The appropriate repair depends on the size of the crack. Can you post some photos of the damage?

Is the horn loose(removable)from the horn core or still attached?

The horn is loose.

If you are gluing two pieces together I would use a two part epoxy (something like a 5 minute epoxy should work) and clamp the area together. You can also use the epoxy to reattach the horn to the horn core. If you are unable to close the crack you can epoxy the horn to the horn core then fill the gap with a two part sculpting compound like Epoxy Clay and color/texture it to perfectly match the horn. The repair should not be noticeable if done well.

Depending on what the repair looks like it might require some light sanding and recoloring of the horn.

Kind of hard to say with out seeing the damage.

grafton,

thanks very much for the info.