I know it is hard to have to give up a dog this way. We had to rehome one of ours that was killing our chickens as well. We were lucky to place him with a non chicken family that we know. I am from North Edwards as well. APET is an incredibly small shelter run by mostly volunteers. They do not update their site often. I think it would be better to let go as well. They will not give out personal information on who adopted the dog. Even if you found out, chances are highly unlikely his new family would allow you to visit. I think you need to let go. Be happy has a family and your chickens are safe.