Could you include some pictures? Do you see any maggots on the wound. Many times in hot weather flies will lay eggs on messy vents or in wounds, causing flystrike, which can be deadly. Let us know what you find. Most wounds (without flystrike) should be cleaned with a disinfectant such as Chlorhexidene/Hibiclens, rinsed with water. Or use 10% Betadine (Walmart has Equate Antiseptic Wound Disinfectant, which can be weakened.) Later saline can be used twice a day to rinse the wound. After each cleaning, apply plain Neosporin or triple antibiotic ointment.
If you do find any maggots, soak in warm water several times for 24 hours and get every maggot off that hatches out and seen. Permethrin can be sprayed on the wound or SWAT gel can be applied to kill any fly larvae.