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Your horse needs to be clean for the foaling so that the foal doesn’t come into contact with germs or bacteria. You don’t want to risk infecting the foal. Rinse your horse with warm water, then use a clean sponge to create a lather with the soap. Rinse the soap away, then apply a conditioner if you have one. After your rinse away the conditioner, you can dry off the horse with a large towel. It helps to wash the horse in sections. For example, you might wash the left side, followed by the right side. Then, you could wash the face and neck. Mix the soap into the warm water. Then, rinse your mare’s udders with warm water. Using a sponge dipped in the soapy water, gently wipe down your mare’s udders. Separate the folds on and around the udders to make sure you get them clean. Then rinse the area with warm water.  Use a light, gentle stream of water, as a hard stream of water will cause your horse discomfort. Your foal will be nursing on the udders, so it’s important that they’re clean. Use a mild soap, such as horse shampoo. Wet the genital area with warm water, then use a clean sponge dipped in warm, soapy water to clean the outside of her genitals. Then, use your fingers to gently turn the lower part of her labia inside out so you can remove the waxy buildup inside it. Finally, rinse the entire area with warm water.  Never, ever put soapy water in your mare’s vagina, as this can cause an infection. Only clean the outside of her labia. Be careful when cleaning your mare’s genitals, as she may attempt to kick you. Fold the tail up so it’s shortened. Then, wrap clean plastic wrap around the tail to keep the area sanitary and hold in the hair. Secure the plastic wrap around the tail with rubber bands or additional plastic wrap. Tie it in 2 or 3 spots to make sure it won’t come loose. Make sure your ties aren’t too tight and take down the tail shortly after the foaling. Otherwise, you might accidentally cut off circulation to the tail, which can permanently damage it.
Wash your mare with a horse shampoo a week before foaling to remove germs. Clean your mare’s udders with warm water and soap. Wash your mare’s genitals to protect the foal. Tie up the mare’s tail when she goes into labor so it’s out of the way.