How to address various kinds of animal

[dclayh]

Dog: "Guten Tag, Herr Hund!"
Turtle: "Saluton, little buddy!"
Cat: the xkcd or T.S. Eliot methods are acceptable.
Rabbit: "Herr Doktor Professor Bun-bun."

and new today,

Cardinal: "Greetings, your eminence."