Mississippi.

I know you can mail fish (I've got an aquarium semi-business) but basically all you do is put them in a styrofoam cooler then a box and stamp this side up and fragile live animals on the box and overnight it.

I seem to remember my father receiving chicks in the mail once as well.

I'll see what I can find out, can you do the same and we'll meet in the middle with our answers?