first, I'd keep your legs together in future, accepting that you had PTD then your case is not as bad as it seems though it won't do you much good having sent the father and baby off saying you never wanted to see them, now you suddenly think you can change your mind and get everything back. I...
in all eco systems there is a balance between predators and prey, so if you bring in a new plant or animal there will not be the means to keep it in check and they will take over the position of native species very quickly, for example the Austalian Possum in New Zealand has no natural predator...