Producing quality milk is about more than just clean cows and working equipment — it’s about discipline. And two of the most critical, yet often underestimated, parts of any milking routine are the pre- and postmilking teat dips.
According to the 2014 National Animal Health Monitoring System survey, 96% of U.S. dairies used a predip, and nearly 97% used a postdip. But choosing the right dip is only half the job — how and when it’s applied makes all the difference.
Dr. Pam Ruegg, professor at Michigan State University, explains that predips and postdips serve very different purposes.
Predips aim to eliminate environmental pathogens that cows pick up between milkings. These bacteria live in bedding, manure, and soil, and can be transferred to the teat surface before the unit is attached.
Postdips, on the other hand, target contagious pathogens that may spread from cow to cow through milking equipment. After milking, teats are still exposed to residues that can harbor infection.
Iodine remains the most widely researched compound for teat dips, but it’s not the only effective one. What matters is that the product is proven safe and supported by real efficacy data. Ruegg recommends choosing brands that publish test results and working with trusted suppliers to understand a product’s performance.
Equally important: always apply dips to clean teats. No teat dip in the world will work if applied over manure or dirt. If teats are visibly dirty, clean them with a dry cloth — never water, unless you fully dry them afterwards.
Finally, don’t fall into the trap of constantly switching products. A dip won’t cure mastitis, its job is to prevent it. Focus on a consistent routine with good application. The most effective teat dips are ones that are applied properly. Cattle Care supports dairy teams in building consistent workflows and aids in training employees to apply dips with precision. Ensuring proper, adequate coverage is the first line of defense in preventing mastitis
