You need a heard between they and a, first paragraph. You spelled throughout wrong, second paragraph. That's all! That's great for your first paragraph! I wanna hear more! More! More! More!
I have a few constructive criticisms. Don't be offended or take it personally, because your plot looks very promising already, I'm only trying to help you make your story more fun and interesting.
LEGEND:
Blue text = Suggestions for colorful words, and adding variety.
Red text = Corrections.
Quote:
I was also confused why there would be a coop in a world entirely consisting of chickens; there's nobody to build it, and I doubt chickens would be dexterous enough or mentally capable of making one. But hey, if you want this story to be more on the fantastical side, go right ahead.