Old horn stock

[MikeB52]

Hey folks, I wasn't sure if this was the right area to post this so if not, sorry moderators.
I inherited a set of horns with a black hoof mounted in the middle from my dad in the 70s.
Now that I have taken to this straight razor, ummm, addiction i have decided I would like to make some brush handles, maybe some scales out of this set.
any tips or suggestions as to
A) what are these, cow, ram, etc.
B) how to best make use of the material so as not to ruin them for not. i.e.cut lengthwise , not in half, etc.
C) can I turn the hoofs on a lathe and make brush handles from them?
I presume there is more raw material then I need once I know what to do so might have some stock to share.
cheers.