Oh bless your heart, so glad you found this site! Here's what we use its called vetericyn, it's the hydrogel spray. Wound & infection treatment. It's used to treat or prevent hot spots, rain rot, rashes, post-surgical sites, burns, ringworm, skin infections, thrush, e coli, strep, and staph (MRSA)
I know it's late Saturday night, been working on catching up.. Is there any redness around the area? And did you trim back some of the feathers? tried to read as quick as I could but how old is the duckling? everyone is giving you great advice I hope that it all turns out okay. keep us posted..