Thanks, I wish I could keep her out. As soon as I graduate I’m taking my chickens and leaving but until then I can’t do much. Considering they all had a very small dose I’m holing they’ll be ok
I'm very sorry that you are in a bad situation

@sumi made a good point - it won't hurt to give them a flush. The vitamin K suggested by @Fairview01 would be helpful as well - hopefully they can tell you the dosage - you can find vitamin K at places like WalMart or CVS.
Here's a list of flushes http://www.backyardchickens.com/t/700526/flushes-for-aiding-in-toxin-removal