I had two chickens that got mauled by the neighbors dogs. One died, but I tried everything I could in a frenzy to administer aid. I went to Tractor Supply and bought all the shit. One medication, Blue Coat, comes out in a shiny blue mist. The living chicken is still blue months later. I also later found out it had alcohol which burns on the wound. Felt bad about that, but I'm not a vet, and that fucker still lives (has a bald spot at it's neck, but meh, still covered with feathers. Hoping she's got enough to cover her for winter.) So yeah, blue coat may work, but I sprayed them with like 3 ointments and rubbed neosporin and gave them antibiotics, so who knows what helped more, and the animal will look like Wonka's Violet probably forever.

It's also good for destroying blue colors