Ha, ha, ha, ha. They look great. So, 'chooks' huh? Maybe it has to do with some sounds or maybe a way to shorten even more the name. I bet that double O sound like a short "u" like in book. Maybe I just got above my head with linguistics. Chooks. Gonna start calling them that since it's an Aussie word.
Besides, eggs are cool. Nice source of protein and also needed for lots of things. Tasty things.
When we call them, it's definitely the oo sound, but clipped. Chook chook chook chook chook .. definitely onomatopoeiac!
Ha, ha, ha, ha. Well, it doesn't seem off from the idea. You're actually speaking its language. I bet Chicken Speech is called 'chook'.