I am sorry but I would not have taken the bird to the vet. I would have humanely euthanized it and accepted payment for the value of the bird. Or not. I dont get reimbursed if a fox or coyote kills a bird so I am the type of person who would just consider the dogs to be just another predator. Then I would look at my set-up and figure out how to prevent another attack. My set-up right now has worked well for the past few months and I am happy with it. I do however have some ideas to make it even better.
Now I know people get attached to their birds but my turkeys are here to go on my table. While they are here I enjoy having them around, for the most part, but I am not going to spend $70 to treat them. Nor would I consider those dogs dangerous. They are dogs. They are retrievers. Makes sense that they were drawn to the birds. It was an unfortunate accident and now the dogs will have to pay the price. I know others will disagree with me but I am a dog person first and foremost. Always have been, always will be.