Sad Sight In The Chicken Coupe This Morning

The neighbors dog has been coming by quite often lately.  Yesterday the dog was there, and I found feathers from a brown hen.  I thought maybe a hawk or something.  I told the neighbors dog to go home, and he did.  This morning I woke up, and looked outside, I see the neighbors dog eating a white chick!!   I scared him away, and walked down to the coupe.  I found all but 6 chicks dead!  27 Gone!!!