Those poor birds
The one remaining hen has to be traumatized. Rescue Remedy - drop or two in her water for stress for a good few days. Poultry Vitamins/Electrolytes for a couple days. She will be very lonely - bring her in and/or spend lots of time with her, give her lots of TLC and healthy treats to distract her like sunflower seeds, eggs, bits of fresh cut off grpaes/berries/apple - whatever you know she likes. Have someone be outside and dig for her - she will hopefully show interest in any bugs that are uncovered. She really needs buddies asap but there is of course the worry of bringing in disease - ugh - never easy - maybe someone you know has 1 or 2 adult hens whose health and conditions you've known and followed for some time. Maybe they're the low end of the totem pole where they are now and would welcome the relief of a new home.
I hope you know or are able to ID the dog's people. For the sake of the fallen birds - who died horrifying deaths and also had to endure watching others of their kind be killed before their eyes - and for the sake of all birds still alive there or anywhere, it's crucial that we take legal action against/bill the dog's humans whenever possible. Only through such actions will the collective consciousness get raised (unfortunately). And until such time, dog attacks will not diminish. There are many other threads on BYC to give you assistance on how to go about this.
JJ

The one remaining hen has to be traumatized. Rescue Remedy - drop or two in her water for stress for a good few days. Poultry Vitamins/Electrolytes for a couple days. She will be very lonely - bring her in and/or spend lots of time with her, give her lots of TLC and healthy treats to distract her like sunflower seeds, eggs, bits of fresh cut off grpaes/berries/apple - whatever you know she likes. Have someone be outside and dig for her - she will hopefully show interest in any bugs that are uncovered. She really needs buddies asap but there is of course the worry of bringing in disease - ugh - never easy - maybe someone you know has 1 or 2 adult hens whose health and conditions you've known and followed for some time. Maybe they're the low end of the totem pole where they are now and would welcome the relief of a new home.
I hope you know or are able to ID the dog's people. For the sake of the fallen birds - who died horrifying deaths and also had to endure watching others of their kind be killed before their eyes - and for the sake of all birds still alive there or anywhere, it's crucial that we take legal action against/bill the dog's humans whenever possible. Only through such actions will the collective consciousness get raised (unfortunately). And until such time, dog attacks will not diminish. There are many other threads on BYC to give you assistance on how to go about this.
JJ