i dont know (mabe they just like your doorstep).
A pigs head on your doorstep is an ominous warning to the recipient. This means that somebody might want to hurt you.
"Raven" is a black bird.
nothing, there is no meaning at all.
Your house smells.
Traditionally, finding a penny is a sign of good luck. However, in Canada, where pennies are about to be phased out, finding pennies on your doorstep will soon mean that someone thinks you are in the scrap copper business.
Cuervo.
possibly (no)
corbeau
Raven.
Could mean anything, but my guess is your cat brought you a present.
You will meet with an untimely death