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What Chronic Wasting Disease Looks Like in a Deer (And the Disease That's Far More Likely)
When someone finds a deer dead on their property with no obvious injury, chronic wasting disease is usually the first thing they've heard of and the first thing they ask about. Here's the honest answer to what CWD actually looks like, why that answer frustrates people, and why a different disease is a much more likely explanation for a dead deer in Washington.
What CWD Looks Like: Usually Nothing
This is the part that surprises everyone. Most deer infected with CWD look completely normal until the very end stages of the disease. That's not a hedge — it's the central reason wildlife agencies rely on laboratory testing of harvested and found-dead animals rather than visual screening. You cannot look at a live deer in your field and tell.
In late-stage animals, the name describes the main sign: wasting. Dramatic weight loss, a deer that looks drained and bony while still walking around, stumbling, drooping ears and head, excessive drooling, excessive drinking and urination, and a complete loss of the wariness that normally keeps a deer away from people. A deer that lets you walk right up to it is behaving abnormally, and that's worth reporting regardless of cause.
CWD is a prion disease — a misfolded protein, not a bacterium or virus — affecting deer, elk, moose, and caribou. It is always fatal, there's no treatment and no vaccine, and prions are not destroyed by the things that kill ordinary pathogens. That durability is why it's taken as seriously as it is.
Where CWD Actually Is in Washington
Washington confirmed its first CWD case in July 2024. WSU's Washington Animal Disease Diagnostic Laboratory flagged a positive sample on July 26 and confirmed it on July 30 — a white-tailed deer found dead back in February in the Fairwood area of north Spokane County. Four additional cases have been confirmed since: three more in Spokane County and one in Pend Oreille County.
The honest local read: that's five cases, all in the far northeast corner of the state, several hundred miles from Pierce and Thurston County. CWD is genuinely new to Washington and genuinely serious, and it is not currently an explanation for a dead deer in my service area. I'd rather tell you that than let you worry about the wrong thing — the same way I handle rabies, which has never been documented in a Washington raccoon or coyote.
EHD: The One That's Actually Killing Deer Here
If a deer in Washington died without an obvious injury, epizootic hemorrhagic disease is a far likelier candidate than CWD — and almost nobody searching has heard of it.
EHD is a virus spread by Culicoides gnats, biting midges that thrive in hot, dry weather, exactly when deer are concentrating around shrinking water sources. WDFW has tracked a real outbreak in its Eastern Region, with Stevens County (15 confirmed cases) and Spokane County (8) hit hardest, plus Walla Walla County (5) and Whitman County (2). It primarily hits white-tailed deer. A related virus, bluetongue, affects mule deer and — importantly for anyone with stock — livestock as well.
What EHD Looks Like, Compared to CWD
Unlike CWD, EHD produces signs you can actually see, and it moves fast rather than over months:
- Lethargy, disorientation, or a deer that's simply unresponsive
- Labored breathing
- Heavy salivation, foaming around the mouth or nose
- A swollen, bluish tongue
- Reddened, swollen eyes and nose
And the detail that matters most for finding one: infected deer run a fever and go to water to cool down. A carcass in or right beside a pond, creek, or stock tank in late summer is a classic EHD presentation. If you've found a deer dead in or near water during a hot stretch, that's the first thing I'd think of — and it's a reason to deal with it promptly, since a carcass in standing water is its own water-quality problem.
The Practical Difference Between Them
For a property owner, the distinction comes down to this. EHD outbreaks are seasonal and self-limiting — the gnats die off with the first hard frost and the outbreak ends, and the deer that survive develop immunity. CWD doesn't work that way: it persists, it spreads animal to animal and through contaminated environments, and prions stay in soil. That's why CWD gets emergency rules and carcass transport restrictions while EHD gets a public advisory.
Neither one is a reason to panic about your own health. Neither EHD nor bluetongue infects humans. CWD has never been shown to infect people, though agencies consistently advise against eating meat from an animal that tested positive — a reasonable precaution rather than evidence of a known risk.
What to Actually Do With a Deer You Suspect Died of Disease
Report it, then handle it properly. Washington requires a call to WDFW or Washington State Patrol before you move wildlife found dead on your property (WAC 220-400-040) — and with disease surveillance active statewide, that call has more value now than it used to, since found-dead animals are exactly what the testing programs want to see. From there, the disposal rules and your real options are covered in full. For the broader picture of handling a dead deer, including roadkill and salvage permits, see dead deer removal.
Frequently Asked Questions
What does chronic wasting disease look like in a deer? Usually nothing — infected deer appear normal until end-stage. Late signs are severe weight loss, stumbling, drooping head and ears, heavy drooling, excessive drinking, and loss of fear of humans.
Is CWD in Washington state? Yes, since July 2024. Five cases confirmed so far — four in Spokane County and one in Pend Oreille County, all in the far northeast of the state.
What is EHD in deer? Epizootic hemorrhagic disease, a virus spread by biting Culicoides gnats in hot dry weather. It causes fever, swollen bluish tongue, foaming at the mouth, and disorientation, and infected deer often die in or near water.
Can chronic wasting disease or EHD infect humans? EHD and bluetongue don't infect people. CWD has never been shown to infect humans, though health agencies advise against eating meat from a positive animal as a precaution.
Why is a dead deer lying in my pond? Often EHD — infected deer run a fever and seek water to cool down, so carcasses in or beside water during a hot stretch are a recognized sign of an outbreak.
Found a deer down and not sure what you're looking at? Call or text (253) 905-2220 or request a quote — I handle the removal, and I'll be straight with you about what I can and can't tell from looking at it.
Sources: WSU Washington Animal Disease Diagnostic Laboratory (first Washington CWD detection, July 2024), Washington Department of Fish and Wildlife (CWD surveillance and Eastern Region EHD outbreak case counts), Washington Administrative Code 220-400-040.