
Farmed Deer I can't comment on, but My family in Norway have always used Reindeer :) My Grandfather told me the Russian fur traders called it the 'Golden Horn' (we joked because it's also known as an aphrodisiac ;)) but the Golden referred to the huge and diverse value! Studies have shown that the Reindeer antlers are more biologically active as they generally roam in areas free of pollution. (My Grandfather also uses Elk)
But yes, my family through the generations have noted the benefits from a homeopathic point of view (as every part of every animal has a use back home)
HTH?