Actually, when you look at a cow and at a lion, you can surely see a difference in their body constitution.
Because cow is made to eat "herbs" and lion is made to hunt, kill and process meat.
Did you use the examples of a cow and lion intentionally or ironically?
Isaiah 11
6 The wolf also shall dwell with the lamb, and the leopard shall lie down with the kid; and the calf and the young lion and the fatling together; and a little child shall lead them.
7 And the cow and the bear shall feed; their young ones shall lie down together: and the lion shall eat straw like the ox.
Isaiah 65
25 The wolf and the lamb shall feed together, and the lion shall eat straw like the bullock: and dust
shall be the serpent's meat. They shall not hurt nor destroy in all my holy mountain, saith the LORD.
That's one of the strange things that I don't like about the Bible.
God asks for blood sacrifice?
I don't believe it.......
You lack understanding.
God doesn't delight in blood sacrifice anymore
than a parent delights in punishing his or her child.
God does not desire sacrifice.
However the blood sacrifice had an important purpose.
Imagine if you had a flock of sheep (or whatever) that you cared for, and whenever
you sinned you were required to select your best one and kill it to pay for the sin.
Unless you're a psychopath, that would be difficult and emotionally painful for you.
It might give you pause the next time you considered sinning.
Similarly, we are to examine ourselves when we partake of the Lord's supper.