This spring we have seen a large number of horses with small scabs on their lower legs. These scabs are from fly bites as there are a large number of biting flies in the pastures. Because of the large amount of rain we have had in central Texas, the pastures have a lot of tall grass. Flies and mosquitos attack the horse's legs as they walk through the grass. These flies bite the horses and cause small inflamed areas that become infected and form scabs. Horses become sensitive to removal of these scabs and treatment of the affected areas.

Treatment of the condition requires removing the scabs. The best method of doing this is gently scrubbing them with an antibacterial shampoo such as Betadine and letting them soak until the scabs soften. The scabs can then be removed without pain. Many of these horses need to be placed on oral antibiotics for a few days because of infection. As far as treating the small fly bite wounds, bathing with antibacterial shampoo and keeping the scabs off is usually effective. In some cases, applying an antibacterial and cortisone combination ointment such as Panolog will decrease pain and aid in healing. Shredding the pastures may also help decrease the number of flies that seem to be prevalent in the tall grass. As far as fly control, there are many options available but the best product we have found is a spray called Endure; spray the horses twice daily with this.

Some horses who are hypersensitive to fly bites may also get large welts and hives. These horses usually require treatment with cortisone and antihistamines. If your horse is having skin problems this spring, contact your vet.