I'm so upset that 4 of my 6 hens and two roosters were killed today by a dog that got loose in the neighborhood I have two hens left from my flock of 8 Now I'm worried about the two that survived and don't know what to expect. One of the survivors is a buff Orpington that was always with another buff which was killed, they were the lowest of the pecking order. Now it's one buff and one barred rock hen that don't particularly like each other. I'm worried they won't lay now and do chickens grieve? I sure am Any advice or thoughts?