I had a bad case of scratches on my mare's white legs a few years ago and tried all of these things, including prescription meds. It turned out that I had accidentally done too much -- too much picking scabs, too much ointment, too many different kinds of antibacterial or antifungals. It ended up killing off some of the 'bugs' but the really strong ones were left behind and totally took over. Vet ended up putting IV in her neck with the last remaining antibiotic that these bugs were not already resistant to. So...... you don't want to go that route. If you've already been dealing with this for a while, or have tried different over-the-counter products without success, please get a bottle of Vetericyn gel spray. This is what finally finished clearing my mare's scratches when they came back after the IV came out. You should clean off any ointments already on the legs so that the gel can get to the skin (use the very mildest shampoo you can get for horses, or Betadine scrub). Rinse well, and dry if possible. Then thoroughly coat the horses's legs with the Vetericyn spray and allow to dry. I used it 2-3 times a day at first. You'll know it's working when the scabby spots dry up, there's no more oozing, and -- most important -- no more spreading of the scratches. If it doesn't work in 2-3 days to stop the spreading and start drying up, or if your horse won't walk because of painfully swollen legs, then get the vet out. The lymphedema condition is one that can be a life-threatening condition and even if they recover, it can cause lifelong lameness.
Very best of luck with this.
Last edited by Ladytrails; 03-07-2013 at 02:14 AM.