Hello and welcome to BYC!That site doesn't have a place to post on

Yes, you can post to the ER forum. Please follow the link provided by Penny in post #9.
If your chick survives, you need to get her some friends. Chickens are flock animals and need others of their own kind.
You will obviously need 1/4" hardware cloth to secure your coop... and also your brooder from the sounds of it. Good luck with your last chick. I hope she makes it.