★★★★★
I was in a similar situation with one of my dogs and what worked to save her tail was Real Willard Water. The vet saw her and prescribed antibiotics but felt because the tip of her tail was cold and the skin was starting to turn black that we would have to dock it if the antibiotics did not work. I called the number on the Real Willard Water website, got a live human who advised a dose for me [I cannot recall] and then sent the WW next day shipping. When it arrived the next day I put it in a mister and sprayed the tip of the tail, and also added WW to the food and water. As soon as the tail was sprayed with WW it began to heat up and feel warm to the touch! The tail was saved, however where the skin was black the hair did not grow back - so bald healthy skin where the black skin had been.
You might also consider sprinkling turmeric on the wound - the kind you find in the grocery aisle will work.
And - docking an inch or two off the tip of his tail might be the best way to go; if this is a show dog the long feathering on the tail will help disguise the lack of a full tail.
