CALL YOUR VETERINARIAN WHEN:
The infection grows worse despite treatment or does not heal within two weeks. Your veterinarian will want to rule out other conditions, such as vasculitis0 or mange0, which can look very similar to scratches. In addition, a prescription medication or a different treatment may be needed if the infection proves to be fungal rather than bacterial in origin.
The affected legs start to swell. If pathogens penetrate the outer layers of the skin, a serious infection of the deeper tissues may result, leading to painful swelling. You’ll want your veterinarian to begin treatment promptly.
The infection recurs persistently, despite treatment and changes in the horse’s living conditions. Some horses are just more prone to scratches. But if yours seems to be constantly affected when others around him are not, your veterinarian will want to investigate the reasons why. One possibility is that your horse has an underlying disorder that affects his immune function.