Contemporary Halacha Shiur #8 - 5769 Rav Schachter, shlita, discusses 1) mesorah regarding: turkeys, fish (tuna fish [and bishul akum], swordfish, king clip fish, barbuta), and animals (zibu); 2) halachic issues with veal; 3) checking produce for insects (and miut hamatzui); 4) enzymes (chometz shel nachrim, gevinas akum, davar hama'amad).