Topical sprays and ointments serve distinct roles in wound management, depending on wound stage, location, and cleaning needs. Sprays excel in initial decontamination, while ointments support later healing phases.  For acute, contaminated wounds or hard-to-reach areas it will be best to use the SPRAY as it allows for easy, non-contact application to flush debris, deliver antiseptics, and reduce infection risk early on, such as in trauma wounds, shearing cuts, foot rot, or abrasions needing frequent reapplication.  The OINTMENT best suits clean, granulating wounds during inflammatory or repair phases, providing occlusion, moisture retention, and prolonged antimicrobial action.  It is preferred over primary sutures, hot spots, or areas requiring a barrier and moisture retention such as open and degloving wounds as well as under bandaging.  

Seek veterinary advice for the proper treatment of your horse.  It is very important that it is determined if NWS is a treat and if so, it needs to be reported to the Texas Animal Health Commission (TAHC) https://screwwormtx.org/reporting/   The F10 Antiseptic Wound Spray with Insecticide is approved by the FDA for the emergency treatment of such wounds.  For more product information and directions for use, please use this link