You're so sweet. I am actually hoping the house just outside of Wayland that just came on the market a few days ago is the one, but I'm not worried about that area and chickens at all, it's zoned ag. It's just that I think we might consider this house in Moline as a backup plan.
I live in Moline (east of it, actually) and you can definitely have them here as we're rural and it's considered Allegan county. Depending on where your house is going to be, you're going to be either Leighton or Dorr Township. We're in Leighton and there is no problem with them here. I would imagine Dorr Township would be similar.
Let me know if you have any other questions about the area--we've been living here for the past few years and love it!