No Change in Structure of Animal Flesh after the Cross Of Calvary

The animals whose flesh properly digests and nourishes the human body were so MADE IN THE ORIGINAL CREATION. No change was ever made in the structure of mens bodies at the time of the flood, or at the time of Jesus death, or any other time. Neither did God make some sudden change in the structure of animal flesh, so that what once was unfit for food will now digest properly and supply the bodys needs.
The unclean animals were UNCLEAN BEFORE THE FLOOD.
Notice, before the Flood, Noah took into the ark of the CLEAN animals, to be eaten for food, by SEVENS; but of the unclean, of which he was not to eat during the Flood, by TWOs only enough to preserve their lives. The inference is inescapable that the additional clean animals were taken aboard to be eaten for food while Noah and his family were in the ark.
Prior to the flood, clean animals were usually offered as sacrifices. Those who ate the sacrifices often partook of the animal flesh, but vegetables were the main constituent of diet. After the flood, God gave Noah not merely the green herb vegetables as the major part of diet, but of every type of living creature clean animals, clean fish, clean fowl. (Genesis 9:3 and Leviticus 11).
This verse does not say that every living, breathing creature is clean and fit to eat, but that "as the green herb have I given you all things." God did not give poisonous herbs as food. He gave man the healthful herbs. Man can determine which herbs are healthful, but man cannot by himself determine what flesh foods are harmful. That is why God had to determine for us in His Word which meats are clean. Since the flood, every clean, healthful, nonpoisonous type of animal life is good for food just as God gave us the healthful, nonpoisonous herbs.
This does not give us permission to do as we please!