Good luck! My hen was bit to the bone. It was a massive injury. I thought about culling her since her wounds were so bad, but since she was still eating, drinking and acting mostly normal that I decided against it. I gave her aspirin for the pain. Her skin is still bunched up on both sides, but new skin grew and so did feathers over the new skin!!!! It was amazing and unbelievable to see such a remarkable recovery!
I did not separate my injured hen from the flock only because she is high up in the pecking order. Her wings covered most the injury and I sprayed blue-kote on both sides as well. Not one other hen pecked her injury which is surprising too! My injured hen did rest in the corner a lot with her back to the corner. Her wounds did get infected, but treating her with fish mox saved her. I sprinkled some on a piece of bread and she gobbled it right down. I spent a lot of time in the coop making sure she was okay. I also gave her vitamins and extra protein snacks.
I know how stressful and worrisome this is. I never expected her to lay since the bite wounds were so deep. I do not know how she got away either. All her feathers on both sides were plucked from the coyote. They are still in the woods. I did lose a few of my best hens that day. Ever since, I've kept them locked up unless it reaches 100 outside, which has been this way for the last few days.
		
		
	
	
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If this dog is a neighbors dog, then they are responsible for the damages. Although, my neighbor refuses to compensate for her dog eating our hens(now she has 2 chicken eating dogs

). I'm so very sorry for your losses. It is very hard to lose such great animals. I hope your hen heals as quickly as mine did!