I hope you realise that by imposing so many constraints on who can answer your question you have most probably excluded at least 90% of potential answers.
It's worth bearing in mind that the majority of Kudoz 'players' are not paying members; that site recommendations do not favour the listing of all our specialist areas; that many non-native Spanish '(ab)users', like me, have lived and worked in Spanish-speaking countries for many years and, by force of habit and neccesity, have acquired a significant vocabulary in Spanish which might be of use to you now.
That said, try: "sacrificio tradicional":
CAPITULO 7: Sacrificio del ganado En algunas circunstancias, el sacrificio tradicional puede estar exento de un aturdimiento anterior al sacrificio. Pero sea cual fuere el método de ...
www.fao.org/docrep/.../x6909s09.htm - En memoria caché - Similar