While I find them interesting ideas, [@Lmpkio], I find them not among the vein of the story at hand, which is meant to be more akin to a sort of telling of a post apocalyptic setting from the perspective of animals. There are not so many aberrations or monsters, and those that do exist are mostly made up of the myth that surrounds some figures; "people", or in this case animals, are the real horrors here.

From a technical standpoint in the events, most revived species were done so out of human curiosity to make it a possibility; to return extinct species. In a practical sense, mammals are among the easiest to do this with and the most worthwhile in terms of research. Most modified animals to bear near human intelligence were first created to better understand the human mind itself, as well as to push the limits of what genetic engineering could do with little repercussion. In fact, the "mad science" or "military" take on the matter was never well developed and fiercely opposed. Up until the destruction of most modern technologies, it was the greatest challenge to date for human beings, as it begged many questions most felt uncomfortable about.

In the end, while they are interesting ideas, you are in a story that is more [i]Mad Max[/i], [i]The Last of Us[/i], and [i]The Pride of Baghdad[/i] than you are in a [i]Fallout[/i] type setting.