Veterinarians all have an emergency after hours phone contact.
And how long have you had the Dog? any part of animal turning Green from accident/dog fight/human abuse need immediate attention did gangrene occur to you? Hard to believe there are no other Vets within a fifty mile drive of you.
Next town Emergency vet services,whatever it takes. Dog could easily die from shock. He is in pain and it cannot wait. Worry about the bill later. There is help for such situations. Main thing. Get him in immediately.
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