Coconut oil won't hurt any chick. If it turns out she's not constipated, it still isn't going to hurt her. Your extra virgin cold pressed will do just fine.
Recently I had a chick who suddenly came down very sick. It stopped eating, chirped constantly, couldn't seem to get warm, even though it's being raised by a broody hen. It had just turned a week old.
This treatment probably saved its life. I took some coconut oil that was in its solid form and...