As a general rules of thumb -
1) Don't eat anything that has eaten people.
2) Don't feed people to things people eat.
3) Don't eat anything that feeds on or derives sustenance from unprocessed human waste.
4) Don't feed something the remains of its own kind.
5) Don't feed something food derived from the remains of its own kind, or from its own unprocessed waste.
6) Don't eat people. It is generally not a healthy practice... to put it mildly.
Oh, and in the kitchen... Don't mix meats. Wash utensils and cutting surfaces before switching between different kinds of meats.
#3 and #5 have been part of the European farm scene for ages. Night soil/human waste allowed to compost or what ever is done with it or too it prior to spreading on the fields exists probably world wide or used to, if present rules prohibit.
True! Eating people isn't healthy! Too high in saturated fat and choloesterol! The health concious canibal wants a healthy alternative, and that would be HUFU!
Mark