Suddenly and without warning, there is worldwide Trypanomiasis Plague, which kills off the last remaining swine who had been peacefully grazing in the far north of Beringia. At this point, the remaining Dog Faces are limited to the mountains of the Laramide where their intelligence allows them to survive in this difficult environment. Meanwhile the rabbits somehow develop wings and learn to fly, giving them clear dominance in the insectivorid environments while making them utterly uncatchable by any predator. The original Two Tusker is still developing also, adding a tripod stance, and now taking away the last home of the Dog Faces who go extinct. The Jurassic closes with a bang as due to ocean absorption of carbon-dioxide, the earth enters a new Ice Age.
Ice fills the Alberta Delta and the connection with South America is severed.
There is widespread dislocation and loss of population. The Rabbit Crocs and their Ornithopods relations, predators all, are clear leaders at this stage with twice the population of any other single type. There is rough parity between the Crimson Croc and the Two Tusker families. In response to the catastrophe and the disappearance of many marine environments, the Crimson Croc shrinks to a size of one ton, simultaneously developing the ability to drink seawater. The Two Tusker also shrinks somewhat with its predator the Rabbit Croc following this trend.