Lemonparty,
You're quite mistaken about, there being no scriptural texts about the corruption of animals :
"18 And their judges and rulers went to the daughters of men and took their wives by force from their husbands according to their choice, and the sons of men in those days took from the cattle of the earth, the beasts of the field and the fowls of the air, and taught the mixture of animals of one species with the other, in order therewith to provoke the Lord; and God saw the whole earth and it was corrupt, for all flesh had corrupted its ways upon earth, all men and all animals." (Jasher 4:18)
(Jasher is a legitimate scriptural text, which is quoted by the NWT canon)
There are several other historical and or scriptural texts that discuss the corruption of animals, by the Nephilim. It is possible that the dinosaurs came about, through cross breeding, and this was the reason that they were destroyed permanently.
2 Enoch 18:3-5 " These are the watchers, 200 leaders of whom fell away and went down to the land of Hermon. They took a vow on Mount Hermon, seeing how gorgeous human women were, and they took them as wives. The land was raped, the women acted like scoundrels, and the whole era was marked by criminal behavior and cross-breeding. Their children were giants and monsters."