MYNORTHWEST NEWS

By the water this weekend? Beware of potentially deadly dog disease

Aug 8, 2025, 6:04 PM

dog disease...

A black lab and golden lab swim in the water together. (Photo: Eric Sonstroem via Flickr Creative Commons)

(Photo: Eric Sonstroem via Flickr Creative Commons)

Those heading to the water to cool off this weekend should look out for their pups.

Salmon poisoning disease can be deadly for dogs and is most commonly found in the Pacific Northwest, according to VCA Animal Hospitals. It is mainly seen in dogs, wolves, coyotes, foxes, and occasionally black bears, but does not appear to affect cats.

The disease occurs after the animal eats raw or undercooked fish, specifically salmon, trout, steelhead, or Pacific giant salamanders infected with a parasitic flatworm called Nanophyetus salmincola, also known as a fluke.

Once the animal eats the fish infected with the fluke, the worm embeds in its intestines, spreading bacteria.

Symptoms of salmon poisoning disease

Symptoms of salmon poisoning disease, according to the Oregon Veterinary Medical Association (OVMA), include a fever over 104 degrees, depression, anorexia, vomiting, diarrhea, nasal or eye discharge, and weight loss.

OVMA urged dog owners to notify their veterinarian immediately if they suspect their dog has eaten raw fish and displays any symptoms. If left untreated, dogs will usually die two weeks after eating the fish.

Treatment includes antibiotics and dewormers to kill the parasite. However, OVMA noted that once treated, many dogs are permanently immune to the strain they were infected with.

Veterinarians recommend owners control what their pets eat during fishing trips, leashing dogs at the beach or river, wrapping garbage and disposing of it in secured containers, and not feeding raw fish to dogs.

The disease is predominantly found in Washington, Oregon, northern California, and southern Vancouver Island.

Follow Julia Dallas on X. Read her stories here. Submit news tips here.

MyNorthwest News

convention center paint...

Chris Sullivan

Exclusive Update: Painting of 9th Avenue is underway after Convention Center’s artful mess

The paint the Convention Center used to make the street look pretty couldn't be removed, keeping the road closed for weeks longer than the SDOT street closure permit allowed.

1 hour ago

expedia layoffs...

MyNorthwest Staff

Expedia cuts 58 Seattle jobs in second round of layoffs this year

Expedia Group is cutting 58 jobs in Seattle, according to a WARN notice filed by the company.

1 hour ago

Kitsap County Sheriff burning SUV crash...

KIRO 7 News Staff

Kitsap Co. deputies rescue man from burning SUV after police chase crash

The Kitsap County Sheriff’s Office posted body cam video of deputies rescuing a man they said crashed after speeding away from police before his car caught fire.

2 hours ago

south seattle building fire...

KIRO 7 News Staff

South Seattle building fire extinguished

A fire at a commercial building in South Seattle early Wednesday morning prompted a large response from Seattle firefighters and temporarily shut down traffic along 4th Avenue S.

3 hours ago

outage revenue businesses seattle...

Nia Bliss, KIRO 7 News

Seattle businesses say short notice for multi-day planned outages led to revenue losses

Multiple businesses in Seattle’s Chinatown-International District said they were given short notice for planned power outages between Sept. 14 and 17.

3 hours ago

fall...

Ted Buehner

Dry weather this week offers perfect window for fall color viewing in Washington

The fall season is here. This season is the time of year when tree leaves change colors, offering a collection of vibrant autumn hues.

4 hours ago

By the water this weekend? Beware of potentially deadly dog disease