The Bible has some very strict rules about how to be holy through diet and that you *should* practice the dietary rules outlined in Leviticus and Exodus in order to be holy.
Rule # 1 - It is God's Law that you eat a holy diet!
Your best bet is to become a vegan and not eat any processed foods. That way you can make sure that you aren't eating any creature that moves on the ground. Be holy because God is holy!
"Every creature that moves about on the ground is detestable; it is not to be eaten. You are not to eat any creature that moves about on the ground, whether it moves on its belly or walks on all fours or on many feet; it is detestable. Do not defile yourselves by any of these creatures. Do not make yourselves unclean by means of them or be made unclean by them. I am the LORD your God; consecrate yourselves and be holy, because I am holy. Do not make yourselves unclean by any creature that moves about on the ground. I am the LORD who brought you up out of Egypt to be your God; therefore be holy, because I am holy."
Rule #2 - Only eat meat during the evening
But... if you can't give up the meat, then just make sure that you eat fish (not shell fish) and only eat in the evening. If you eat *any* animal during the day you are unclean simply because you've touched part of the carcass... forbidden animal or not. Plus, you'll have a LOT of laundry to do if you eat during the day. Eating only in the evening saves you the hassle of constant washing because in the evening you're automatically clean! Also, this means you can only hunt and prepare the animal in the evening too... unless of course you don't touch the animal while doing so.
"If an animal that you are allowed to eat dies, anyone who touches the carcass will be unclean till evening. Anyone who eats some of the carcass must wash his clothes, and he will be unclean till evening. Anyone who picks up the carcass must wash his clothes, and he will be unclean till evening."
Rule # 3 - Count the legs!
Flying insects are one of the most abundant food sources on the planet! You'll never go hungry with this holy dietary tip!
Insects have six legs, so they automatically walk on at least four of them. However, some insects may have fewer than six legs or even fewer than four! This can happen when a kid pulls the legs off of an insect once he catches it and then lets it go. To be sure you have an insect that flies and walks on all fours, be sure to count the legs! You absolutely must count the legs on the insect before eating it! If it has exactly four legs, you can not eat it!
However, there are exceptions to this four-legged rule. You may eat locusts, katydids, and grasshoppers who have two missing legs.
"All flying insects that walk on all fours are to be detestable to you. There are, however, some winged creatures that walk on all fours that you may eat: those that have jointed legs for hopping on the ground. Of these you may eat any kind of locust, katydid, cricket or grasshopper. But all other winged creatures that have four legs you are to detest."
Rule #4 - Stick to Chicken Tonight.
As long as you eat it in the evening, chicken is ok to eat. I didn't know that bats were birds... but they are also off limits.
'These are the birds you are to detest and not eat because they are detestable: the eagle, the vulture, the black vulture, the red kite, any kind of black kite, any kind of raven, the horned owl, the screech owl, the gull, any kind of hawk, the little owl, the cormorant, the great owl,the white owl, the desert owl, the osprey, the stork, any kind of heron, the hoopoe and the bat.'
Rule #5 - Beef, it's what's for dinner.
As far as animals that chew their cud and have a split hoof go, you can't get much more cud chewing than a cow. But remember, only in the evening. No hamburgers for lunch! Oh, and NO CHEESE GOATBURGERS! EVER!
"You may eat any animal that has a split hoof completely divided and that chews the cud."
"Do not cook a young goat in its mother's milk."
Locust Bisque 
