Good on you Steve, you can only do your best. I had four White Stork chicks bloodied and badly injured at the beginning of spring, all less than a week old. Between them, they had gaping neck wounds, head injuries, one was gurgling blood, another stabbed through the back and none would take food. No vet would help me, not even loo at them. Though the odds were against me and someone suggested I should have just left them, a view I was very disappointed to hear, I worked to get them back to health and closed the injuries best I could. Two did not survive the first 24 hours, the other two (including the one with a gaping neck wound) did - three months later, after being hacked back to the wild, both successfully left for their migration to Africa. Sometimes you have to do what you feel is right.