I came across this blog today, in which the poster collected a random assortment of hilarious animal signs from the wonderful world of Flickr. The two below are my absolute favorites, but I suggest you take a few minutes to check out all fifteen - well worth it!
1) I can picture in my head is a group of zookeepers huddled together in a circle, thesaurus in hand, looking up and jotting down every possible synonym for the word "irritate." "Well, if we say it a bunch of different ways, maybe visitors will really get what we're talking about! Genius!"

2) All I can say is...that is one smart (and hungry) goat.