DAR,
Sorry bout the bird, I would look at several issues, to be a detective is what you must do.
1. where was bird living, inside, outside? free range?
2. That smell, Dead flesh, it is constant or just when wet?
3. Areas of skin without feathers, being pecked on can be a secondary issue Ill birds or birds with mites, skin lesions, mange etc....
I would look at several things, just for starters,
1. plenty of clean water dehydrated or dirty waterers can cause other illnesses and allow a weakened bird (animal) to be vulnerable to disease that normally would not affect it.
2. After cleaning and debreing the wound sites, a slight scrubbing with a soft tooth brush to remove all necrotic tissue, on large areas I use a squirt bottle of hydrogen peroxide, then flush the wound with water, let dry, and protect it from fly infestation, ( Hydrogen peroxide should not be used for wounds that are already healing, it eats the new tissue. BUT to clean and removed necrotic mess it is the best!
3. Spray open wounds with wound cote or some other anti biotic, spray, cream
4. Make a slight solution of a mite spray and mix with mineral oil (read baby oil) spray the skin liberally, let it soak deep into the skin,
most skin diseases often begin from a mite, scratch, tic etc... so mites, fleas and other parasites that live on the skin need to suffocate, the spray works wonders,
I have a mixture I use of a flea spray mixed with mineral oil. I also have on many occasion used WD 40. clears up the issue in a heart beat! Plus it stops the squeaking.
5. Sanitize the area, Dust with a liberal amount of D. E. I have even pressure washed the building with a solution of bleach, dust the ground with D.E.
6. Keep the bird quiet, and comfy.
Look for infection in other birds, and follow a tight protocol so you dont contaminate the whole herd. you can also let the birds take a D. E. Dust bath. they love it.
Good luck
