What parasites should dairy producers be on the lookout for during winter months?

Cold weather may slow down pests, but parasites are a different story.

Veterinarians say now is not the time to let up the gas on deworming.

“So, as we move into the winter season, the key external parasites that dairy producers need to be on the lookout for are lice and mange mites. The lice that we worry about, there’s biting lice and sucking lice. The biting lice tend to feed on debris, skin, hair, and secretions that are on the skin’s surface, whereas those sucking lice can attach to the cow and feed on blood. The mange mites typically will live around the tail head and the hindquarters. The one that will see most often, particularly in dairy cattle, is chorioptic mange, and we also sarcoptic mange that can be a bit more severe, but it’s far less common than chorioptic,” said Dr. Jennifer Roberts, a professional services veterinarian with Boehringer-Ingelheim.

Roberts says whatever the parasite may be, they all will have an impact on your bottom line.

Related Stories
Shifts in energy demand will influence fuel, fertilizer, and input costs.
Summer fuel rules cap ethanol demand and limit corn upside.
Roger McEowen breaks down the EPA’s updated dicamba regulations and shares what farmers need to do to remain compliant under the new rules this growing season.
Jarrod Hardke with the University of Arkansas break down extreme drought conditions, shifting planting decisions, and the impact of rising input costs on Arkansas agriculture this season.
Effort aims to reduce wildfire risk in Western Colorado communities
Hemp growth is driven by floral demand, with mixed returns elsewhere.

LATEST STORIES BY THIS AUTHOR:

Bryan Combs with USDA’s National Agricultural Statistics Service breaks down new farmland data from the TOTAL survey, highlights key findings, and potential impacts for the ag sector. ASFMRA’s David Klein also shares how those trends are reflected in the current farmland market, especially in the Midwest.
Geopolitical tensions in the Strait of Hormuz disrupt fertilizer shipments, raising costs and creating uncertainty for U.S. farmers ahead of planting season.
APHIS Veterinary Medical Officer Dr. Chelsey Shiveley discusses USDA’s biosecurity resources available to poultry producers ahead of spring migration, increasing the risk of Highly Pathogenic Avian Influenza (HPAI) threatens commercial flocks.
This year at CattleCon 2026, RFD Network’s Kirbe Schnoor caught up with Donna Emick from Pneu-Dart to get her perspective on why education, safety, and accountability matter in the field.
Nebraska’s largest wildfire on-record has burned 650,000 acres, with three other major fires also burning across the state, destroying pastureland and threatening cattle.