mousethief, a few years ago i worked in a kosher slaughter-house,the animals were killed without being stunned and then hung to bleed to death,i think if we kill animals it should be done as humanely as possible.
kim c you could be allergic to monosodium glutamate, its a food additive also known as E621, it is known to cause headaches and is often used in chinese cooking. check product labels for MSG.