Yes. Manuka honey is good for proud flesh in horses because it has been reported to promote faster healing of wounds by stimulating collagen formation, inhibiting bacterial growth and reducing scar tissue. This makes it a great choice as an external treatment option for proud flesh.
Proud flesh can be treated externally with the application of manuka honey twice daily and covering with a non-adherent bandage. The area should be clean and free of dirt, sweat, and other debris before application of the honey.