The Day Dinosaurs Ruled the Earth

Summary
In this story, based on both the Jurassic Park and I Am Legend films, scientists have sucessfully found a way to "clone" dinosaurs, using DNA found in fossils that have been perfectly preserved, complete with muscles and skin. However, the animals quickly proved uncontrollable, and escaped the lab facilities before they could be contained. Eventually they spread out over most of the world, and experienced a population explosion as other species were pushed nearly to extinction by their feeding habits. The dinosaurs invaded major and minor cities, killing most of the inhabitants and forcing the remainders to run to small "colonies" surrounded by high-power electric fences. This is the story of one of those left behind in the city of Grand Rapids, Michigan, having been unable to escape with the rest of his family, and his attempts to survive in a city ridden with vicious carnivores which are constantly on the hunt, having run out of their main food sources. '''Contributions would be MOST helpful, as I do believe this story could make it if I have help. If you have any good ideas (please don't take this as a "rip-off"), please do not hesitate to write them.'''