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In Jurassic Park, we're told that the dinosaurs are built with a failsafe.

ARNOLD: The lysine contingency is intended to prevent the spread of the animals is case they ever got off the island. Dr. Wu inserted a gene that makes a single faulty enzyme in protein metabolism. The animals can't manufacture the amino acid lysine. Unless they're continually supplied with lysine by us, they slip into a coma and die.

Which is all fine and good-- unless you then make three sequels filled with dinosaurs, none of which are being provided lysine. The first two sequels take place on an island that's been completely abandoned by In-Gen. Jurassic World features the original T-Rex, even though it should have died after the first Jurassic Park was abandoned.

Did they ever address this address this in the sequels?

marked as duplicate by Edlothiad, Möoz, Blackwood, Bamboo, Kyle Jones Mar 9 '17 at 4:39

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    In the second one, didnt they say something about them seeking out food that had lysine in it? Im not certain, but I feel I've heard that. – Hypnic Jerk Mar 9 '17 at 2:28
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So my comment was right. Based on http://jurassicpark.wikia.com/wiki/Lysine_contingency

It says that the dinosaurs ate foods that were rich in Lysine, like soya beans or chickens, while the carnivores simply ate the herbivores.

Also, after some Googling, I found In the book "Jurassic Park" does the Lysine Contingency actually get explained? which the answer explains where in the book it is found. Just in case you wanted to know that as well.

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    Chickens are made of meat, right? Why would the herbivores eat chickens? Why wouldn't the carnivores eat chickens? – user14111 Mar 9 '17 at 2:50
  • Chickens definitely aren't part of the herbivore diet? – Edlothiad Mar 9 '17 at 2:53
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    Oh my. I was typing from my phone lol. Edited to reflect that herbivores do not, in fact, eat chickens. – Hypnic Jerk Mar 9 '17 at 2:59
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    Life finds a way. – alemus Mar 9 '17 at 18:44

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