01/13/2025
Question:
I am having a lot of problem with lameness since wet weather set in. Most of them are sore up between the toes.
What is the difference between foot rot and foot scald? What causes either and what is treatment for either? What can you tell me about using Zactran? What other things should I consider? (Mineral, too much grain, etc.)
Veterinarian Response:
First footrot vs. foot scald. Infectious, contagious footrot in sheep if much different than cattle. It is caused by a co-infection of two anaerobic bacteria. The bacteria work together to undermine the hoof wall and cause a liquefactive necrosis. This presents as a moist severe lesion in the hoof wall with a noticeable, distinct odor. Cleaning and aggressive trimming of the hoof is necessary to expose the lesion to air which will kill the bacteria. Even with aggressive trimming and antibiotics it may take 2-3 weeks for the hoof and sheep to be normal.
Foot scald is a white to grey milky type lesion between the hooves. The hoof wall itself is sound and there is no odor. While foot scald will appear contagious in that multiple sheep will be affected. The real cause is that all of the sheep are exposed to the same wet, organic bedding, soil or mud. Getting the sheep into a dry pen/lot/paddock will clear up the infection. Treating with an antibiotic such as Zactran and/or running the sheep through a formaldehyde or zinc footbath will speed the improvement in the lesion.
Based on your description it sounds like foot scald. I do recommend that you do some trimming looking for lesions in the hoof wall and odor. I cannot adequately describe the odor, but believe me you will know when you find it as it is very profound and memorable.
– J. L. Goelz, D.V.M.