This is probably not the best practice, especially in cold weather. First, you are using two different chemicals, pre- and post-dip. The chlorine and iodine may interact, causing teat skin irritation (not desirable in cold weather). Second, your concentration of Clorox is untested and if introduced in colder weather could result in teat skin irritation and chapping. Early research with Clorox used 4 parts Clorox and one part water and had no skin conditioners. This teat dips with Clorox and water has not been listed with FDA. Drying the teats after post-dip is a good practice when the wind chill is below zero. There are some new teat dips with added glycerin that have demonstrated excellent protection during cold weather. Post-dipping with Della Soft may be the saving grace. There are excellent skin conditioners in this dip, but the mixture of the chemicals is still a concern. The minor added expense of an approved pre-dip will pay huge dividends in teat end health and reduced mastitis and somatic cell counts. Dick Wallace, DVM, MS Dairy Extension Veterinarian University of Illinois - Illini DairyNET

Browse related Faqs by tag: dairy cattle