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Ezekiel 33:6 "A responsibilitie of the Watchmen of You people, is to warn You. At Genesis 9:4 It reads, "Only flesh with its soul -it's blood- You must not eat" Genesis 9:4
In this particular scripture, if its not clear, Noah and his Sons are given warning what they can eat and what they cannot eat. Later on, a more specific record is made which may show how they understood Genesis 9:4 to mean, were it reads, " 'As for any man of the sons of Israel or some alien resident who is residing as an alien in Your midst who in hunting catches a wild beast or a fowl that may be eaten, he must in that case pour its blood out and cover it with dust." Leviticus 17:13
It appears that the blood needed to come upon the surface of the earth and the amount, to the discretion of the hunter. And, as regards 'pouring out' the blood may sugjest an unsophisticated technique.