Well, I beg to differ on the "scanvenger" part. Thats not exactly true. I was raised on a farm and pigs were always fed vegetarian diets. Wild boar are mainly vegetarian and only eat meat if vegetarian diet becomes scarce.
documented studies have shown, even humans have the same bacterias etc in them as other animals do. For that matter, bacteria is good, for it is what our bodies use in the correct balance, for breaking down the food we eat. So that does not hold water.
The reason God declares cloven animals were "unclean", is because they are a host animal, for alot more infectious creatures such as ring worm, tape worm and a host more. Pigs will eat spoiled vegetation, just as vultures and other scavenger birds will eat spoiled meat.
But, as with deer and other animals in thier class, will only eat spoiled vegetation when is necessary to survive, otherwise they always stick to live vegetation.
Here is another fact tho too- Eating meat, it takes aproximately 2 weeks for the majority of it to be completely broken down and usable by a human body. And since the human body's normal temp. sits at 98.7, realize, shortly after we consume any meat, it starts to spoil. Hence the reason for body oder.
Another fact- God originally gave man a vegetarian diet in the beginning, because eating that, is eating live food. You can pull or cut a tomato, apple and other fruits and vegetables from thier plants, and they will continue to grow until ripe, if give them partial sun.
Until you bite into that fruit or vegatble, the living enzymes inside it stay alive. But once exposed to air, they die, thus, the fruit is now dead. Normally tho, when eating something and eat it all right away, the enzymes will not die fast enough, that our bodies still get the live food ingested first.
Documented studies prove the above, as well as the fact vegatation is easier for our bodies to digest, plus, we get all the required nutrients our bodies need in full, to stay healthy and strong and more immune to diseases.
God said He gave man every herb of the field and every fruit of the trees etc for our food, because each diverse herb, vegetable, fruit all have thier particular nutrient(s) value to keep our bodies healthy.
After the fall, God commanded man to eat particular meats, because of the growing death of animals would soon grow laying on the earth and really stick it up from decaying. As for now, since all meats are clean for eating, we only need to be sure its fully cooked before consumption.
Many may like it medium to rare cooked, but God forbids the intake of blood products. You can still squeeze blood from medium to rare cooked meat. Thats against God then to consume. Why else would God tell us back in Leviticus I believe, to pour out all the blood first, from any animal taken for eating? For the life of the flesh is in the blood. If were not important, God would not have stressed this point like 3 times or more in that example.
Well, from Jesus' reign here on this old earth, thru the judgement and into the new Heaven and earth Periods, man will be vegetarian again. Why? Scriptures tell us there will be no more death, all the animals who were predators and those hunted by them will lay down together, there will be perfect peace and harmony. Even little children will lead lions and other large predatory animals, etc.
God Bless!!