The CDC Surveyed Backyard Flock Owners About H5N1. The Knowledge Gaps Are a Problem

There are an estimated 2.7 million households in the United States with pet birds, and a significant portion of those households are keeping backyard flocks of chickens, ducks, geese, and other poultry with varying levels of understanding about what avian influenza actually looks like, how it spreads, and what to do when something goes wrong. Three of the 71 human H5N1 cases reported in the United States since March 2024 involved backyard flock owners. Two of those cases were fatal.

The CDC wanted to know what backyard flock owners actually understand about the disease that is circulating in wild bird populations across the country and what they would do if it showed up in their birds. Between July and December 2025, they surveyed 638 flock owners across 48 states. The findings, published in the CDC's Morbidity and Mortality Weekly Report, paint a picture of a population that has heard of avian influenza but has meaningful gaps in exactly the knowledge that would help them protect themselves, their families, and their birds.

What flock owners know and what they do not

The headline number is encouraging on the surface. Ninety-four percent of respondents had heard of avian influenza or bird flu. But awareness of a disease and operational knowledge of what it looks like are two different things, and the gap between them in this survey is clinically significant.

Only 32 percent of respondents correctly identified all the signs of avian influenza infection in birds, including sudden or unexpected death, lack of energy or appetite, difficulty breathing, reduced egg production, and diarrhea. Nearly half knew that unexpected death was a sign but missed other indicators. Thirteen percent said they did not know the signs at all. In a disease where early detection is the difference between a contained flock event and a spreading outbreak, that knowledge gap has real consequences.

The human symptom picture was worse. Only 16 percent of respondents knew all the signs and symptoms of avian influenza infection in humans, which include not just the expected influenza-like illness of fever, cough, sore throat, fatigue, headache, and muscle ache but also conjunctivitis, diarrhea, and vomiting. Twenty-seven percent reported not knowing the symptoms in humans at all. The non-respiratory symptoms are the ones most likely to be missed or attributed to something else, which means infected individuals may delay seeking care and delay disclosing bird exposure to their healthcare providers. That delay has public health consequences that extend well beyond the individual household.

Seventy-seven percent of respondents perceived themselves to be at low risk for infection. Only 28 percent reported being somewhat or very concerned about avian influenza for their own health. That low perceived personal risk, combined with incomplete symptom awareness, is a combination that the CDC authors specifically flag as a potential driver of delayed care-seeking.

The PPE picture

Ninety percent of respondents knew the recommended precautions for interacting with ill or dead birds. That is the good news. The follow-through numbers are more complicated. When asked which PPE they would actually use if they needed to touch ill or dead birds or their environment, 92 percent said disposable gloves, 86 percent said rubber boots or boot covers, 77 percent said an N95 or well-fitting face mask, 51 percent said safety goggles, and only 34 percent said disposable coveralls. Three percent said they would use no PPE at all.

The eye protection number is the one that should get attention from veterinary professionals reading this. Fifty-one percent. For a disease where conjunctivitis is a documented symptom of human infection and where mucosal exposure is a known transmission route, just over half of flock owners reported willingness to protect their eyes during a potential exposure event. The survey also found that higher knowledge was directly associated with increased intention to use PPE across every category. People who knew more were more likely to protect themselves. That is not a surprising finding, but it is a direct argument for education.

The veterinarian gap

This is the number that belongs in every conversation about the backyard flock H5N1 risk: 71 percent of respondents did not have a veterinarian they talked to about their flock.

That statistic sits alongside the documented disease pressure, the knowledge gaps, and the incomplete PPE use and tells a clear story about where the intervention opportunity is. Flock owners who have a veterinary relationship have a resource for early recognition of illness, appropriate reporting, and protective guidance. The 71 percent who do not are navigating H5N1 risk without that infrastructure.

The CDC report specifically calls this out as an action item, noting that encouraging flock owners to establish a relationship with a veterinarian might improve early recognition and response to illness in the flock and serve as a resource to help keep birds healthy. For veterinary professionals, that framing is worth internalizing. Backyard flock medicine is not a niche anymore. It is a One Health access point that connects companion animal practice, public health surveillance, and zoonotic disease prevention in a single client relationship.

The wild bird access problem

Fifty-four percent of respondents reported that wild birds could, or sometimes could, access the food or water of their backyard flock. That number represents a structural biosecurity failure that education alone cannot fully close, but awareness of the risk and practical guidance about physical separation, covered runs, and feed management can reduce it meaningfully. The USDA's Defend the Flock program provides specific resources for exactly this, and directing clients there is a concrete clinical action that costs nothing.

What this means for veterinary practice

The CDC study population skewed educated, rural, and experienced with flock ownership. These are not new or naive flock owners. Forty-eight percent had owned their flocks for three to ten years. Twenty-nine percent had owned them for more than a decade. And still, across this relatively experienced group, the knowledge gaps are substantial and the veterinary relationship rate is 29 percent.

That means the people most likely to encounter H5N1 in their birds are largely operating without veterinary guidance, with incomplete knowledge of what infection looks like in birds and humans, with low perceived personal risk, and with inconsistent PPE practices in the scenarios where protection matters most.

The ask for veterinary professionals is straightforward. If you have clients with backyard flocks, this is the conversation to have. Review the signs of H5N1 in birds. Cover the human symptoms including the non-respiratory ones. Walk through PPE use specifically and address the eye protection gap directly. Talk about wild bird access and what physical separation actually looks like in practice. And make yourself available as the resource for when something in the flock looks wrong.

The surveillance infrastructure for H5N1 in backyard flocks depends on flock owners recognizing illness early and knowing who to call. Right now the data shows they are not there yet. That is a gap the veterinary profession is positioned to close.