# Wildlife linked to H5N1 spread in Wisconsin dairy farm | dvm360

> Genetic analysis confirmed that the H5N1 clade 2.3.4.4b genotype D1.1 found in a Wisconsin dairy herd came from a new wildlife-to-cattle spillover. The herd was the first HPAI detection in Wisconsin, reported by APHIS on December 14, 2025. Sequencing was completed on December 17, 2025.

- Date: 2026-01-06 · published 2026-01-06T12:00:00.000Z
- Category: disease · region US · magnitude low
- Page: https://feedsoft.ai/events/15942-wildlife-linked-to-h5n1-spread-in-wisconsin-dairy-farm-dvm360
- Commodities: [Lean Hogs](https://feedsoft.ai/c/HOGS.md), [Chicken](https://feedsoft.ai/c/CHICKEN.md), [Soybean Meal](https://feedsoft.ai/c/SBM.md)

## Why it matters

A new spillover into dairy cattle raises the chance of further herd infections and milk output losses. The scale so far is small and the price effect is limited.

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| HOGS | 2026-01-01 | [Dairy cattle movement networks govern the spread and persistence of H5N1 B3.13 in the United States \| bioRxiv](https://feedsoft.ai/events/15943-dairy-cattle-movement-networks-govern-the-spread-and-persistence-of-h5n1-b3-13.md) | -0.2% | +3.6% |
| HOGS | 2025-03-24 | [UK reports H5N1 in a sheep on poultry-outbreak farm \| CIDRAP](https://feedsoft.ai/events/16018-uk-reports-h5n1-in-a-sheep-on-poultry-outbreak-farm-cidrap.md) | +0.3% | +1.2% |
| HOGS | 2017-07-26 | [OIE Reports H5N1 Bird Flu Outbreak in Myanmar Poultry Farm
						 \| The Poultry Site](https://feedsoft.ai/events/69828-oie-reports-h5n1-bird-flu-outbreak-in-myanmar-poultry-farm-the-poultry-site.md) | -2.2% | -15.8% |
| HOGS | 2024-06-25 | [What Can Farmers Learn From the Current Bird Flu Outbreak in Dairy Cows?](https://feedsoft.ai/events/16087-what-can-farmers-learn-from-the-current-bird-flu-outbreak-in-dairy-cows.md) | -0.8% | +2.6% |
| HOGS | 2021-12-08 | [Animal health experts: US ag needs to be prepared for disease outbreaks - Farm and Dairy](https://feedsoft.ai/events/16314-animal-health-experts-us-ag-needs-to-be-prepared-for-disease-outbreaks-farm-and.md) | +1.0% | +9.2% |
| SBM | 2026-01-01 | [Dairy cattle movement networks govern the spread and persistence of H5N1 B3.13 in the United States \| bioRxiv](https://feedsoft.ai/events/15943-dairy-cattle-movement-networks-govern-the-spread-and-persistence-of-h5n1-b3-13.md) | +2.0% | +0.9% |
| SBM | 2025-03-24 | [UK reports H5N1 in a sheep on poultry-outbreak farm \| CIDRAP](https://feedsoft.ai/events/16018-uk-reports-h5n1-in-a-sheep-on-poultry-outbreak-farm-cidrap.md) | -1.7% | -1.1% |
| SBM | 2017-07-26 | [OIE Reports H5N1 Bird Flu Outbreak in Myanmar Poultry Farm
						 \| The Poultry Site](https://feedsoft.ai/events/69828-oie-reports-h5n1-bird-flu-outbreak-in-myanmar-poultry-farm-the-poultry-site.md) | -3.1% | -7.2% |

## Sources

- dvm360.com: https://www.dvm360.com/view/wildlife-linked-to-h5n1-spread-in-wisconsin-dairy-farm

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.