Why is it common practice not to eat Giraffe Meat?
As By: Rabbi Ari Z. Zivotofsky Ph.D. explains in detail, there is no reason why not to eat Giraffe meat from a Halachic point of view.
Because giraffes are an endangered species, and we'd get in trouble if we started killing them.
Another possibility is that it's quite dangerous -- a giraffe can kill a lion with its kick!
There is another reason: giraffes are very expensive, and very likely to be found a teraifah, so it is not worth it, and also tza'ar baalei chaim to kill it if it will probably not be kosher.
There are two answers that people say they are both off. The place for Shechting is known it and it is huge. The other answer is there is no market for it put that could be solved with some good marketing (Just look at Sushi).The real answer is to eat something we need a Mesorah that it is Kosher.The Remah says it about birds in Yoreh Deah 82:3. The Chazon Ish(Yoreh Deah 11:4-5) and the Chochmas Adam(36:1) extends this to all animals. Therefore the real reason we don't eat is because we have no Mesorah for it.