Description
VetOne BoviBlock is a non-antibiotic internal teat sealant designed for dry cow mastitis prevention. Formulated with 65% bismuth subnitrate in a mineral oil base, it creates a malleable barrier inside the teat canal to help prevent bacteria from entering the udder during the dry period.
By mimicking the cow’s natural keratin plug, BoviBlock provides physical protection against environmental mastitis pathogens from dry-off until calving. This makes it a valuable tool for mastitis prevention in dry cows and fresh cow udder health.
Because BoviBlock contains no antimicrobial ingredients, proper teat cleaning and infusion technique are critical. It can be used alone or as part of a dry cow therapy protocol, including selective dry cow therapy programs aimed at reducing antibiotic use while maintaining udder health.
The dry period is one of the highest-risk times for new intramammary infections. Cows are especially vulnerable immediately after dry-off and again in the days leading up to calving.
BoviBlock helps prevent mastitis by:
- Forming a physical barrier in the teat canal
- Blocking environmental bacteria from entering the udder
- Protecting cows that fail to develop a natural keratin plug
- Supporting dry cow mastitis prevention throughout the entire dry period
- Reducing the risk of fresh cow mastitis, including early lactation E. coli infections




