The Word Spy

hello,
I've just started reading, The Return of the Word Spy. It is really good. If you haven't read it or the first book, The Word Spy, I recommend it.
Here is a puzzle I made:

Find the Answer:

Zebras Obviously Barking
To find the answer, read more by clicking on the link below1 (Don't worry it doesn't take you to a site filled with malicious software and viruses that take over your computer and renders it useless until the IT person comes and fixes it for you; really, it doesn't - hopefully it doesn't).