Thread:Xandeogre/@comment-25498628-20141027020853

Heres the solution

step 1: Build the enclosure

step 2:On the top of the enclosure build inward atleast one or two blocks inward then when deinonychus tries to jump over the fence they would not go over the wall but they would be blocked (pun intended) by the inward overhang you created

very easy to do unless your using an expensive block to create the enclosure 