The Old Testament has very clear instructions about which animals are good for human consumption, and which are not. There are actually two passages in Scripture which point out the difference between the clean and unclean animals. But modern day mainstream Christianity will tell you that Christ did away with these "outdated laws".
Isn't it ironic that here in 2015, health and vitality seem to evade so many people - the majority have a lack of inherent "get up and go" and need to supplement their diets just to make it through a day! It seems we have lost sight that there are immutable laws that govern the universe, acting upon everything and everyone!