Board Thread:Movie discussion/@comment-13531781-20150717173009/@comment-111.68.60.251-20150717183139

D9 fan wrote: And if you say there's some type of force field or dinosaur repellant then I guess no one decided to put it on the Indominus enclosure. Why would it need one? As far as keeping it in, regular walls worked just fine. The Indominus only escaped because it outsmarted its guards.

And besides that, the paddock was still under construction. When the film starts, Claire mentioned that the walls were already being built higher. Masrani also wanted Owen to take a look at it for extra security measures.