VERY LATE GAMEPLAY IN THIS SUGGESTION + A LITTLE LATER GAMEPLAY IN HERE
so later in the game we will have shepherds and there herds of sheep. well the chupacabra is of course a goat eater but since goats dont existed yet why not the 1st titan be a chupacabra who eats sheep.
next one is ufos we have studied them for 1000s of years with no true hard facts so and what would they take… COWS! case closed…