Good old Google Books. I was looking for pet haiku this morning, finding oh pretty much the same couple of dozen no matter where I surfed. And then I saw the link to a small book published in 2001 by Deborah Coats: Cat Haiku. Not every page is available, but I get nuggets like:
I yowl to the moon;
I am king of the night. Hear
Me and weep, Fluffy.
Fresh kitty haiku! Take a peek.