Send Axis deer hides to US

Hello everyone, Im from Argentina and I want to send a tanned axis deer hide to a friend in the US.
Does anyone know if there are any regulations that could kept the hide in customs?

Thanks!

No restrictions, be prepared to show who and where it came from, usually a form letter from the ranch or estate.
DC

I want to send a package by mail. What information should I submit in the form. Is there a form letter example?
Thanks for the reply!