Kudu shofars, sometimes called a “Yemenite shofar,” are certainly magnificent in appearance and can produce a wide range of tones, but are they kosher? Yemenite Jews generally adhere to the rulings of the Rambam, who maintained that any animal other than a sheep cannot be used for a shofar. How did the custom of using a kudu horn arise in Yemen?
Rabbi Amram Korach, the last chief rabbi of Yemen, suggests one answer: “The shofar of Rosh Hashana that they were accustomed to blowing was long and twisted, two or three twists, and its sound was pure and eerie. Some said that is was from an animal that was similar to sheep. Therefore they did not concern themselves with the [Rambam’s] stringency that only sheep horns are kosher, since they saw that this shofar beautifies the mitzva and its sound was greater than that of a sheep’s [i.e. ram’s] horn. To this very day they blow the mitzva blasts with this shofar, according to the rulings of the Geonim that all twisted shofars are kosher lechatchila” (Sa’aras Teiman, Jerusalem 1954, p. 99).
Ironically, it is more legitimate for non-Yemenite Jewish communities — which follow the Shulchan Aruch rather than the Rambam — to use a “Yemenite shofar” (i.e. a kudu horn) than for the Yemenite community.