Dog swimming in lake

At this time of year toxic algae starts appearing in our waterways. Dog owners should be aware of it if they are walking their dogs by rivers, streams, ponds and lakes.

Potentially toxic algae (also called cyanobacteria) is a naturally occurring algae with the potential to bloom in our waterways, producing toxins that can harm or even kill dogs, people and other animals.

Animals can get very sick if they ingest cyanobacteria. Unfortunately, dogs love the musty smell of potentially toxic algae and are naturally drawn to investigating it — usually by licking or eating the material. It can be quick acting and fatal to dogs. The best way to keep your dog safe is to keep them out of water that may have toxic algae in it.

The algae typically presents in rivers as dark brown or black mats, with a slimy or velvety texture and a musty smell. These mats can detach and cause rafts in the water. In lakes, it is often suspended in the water. The algae can make water look cloudy, discoloured, or like it has small globules in it.

Cyanobacteria poisoning symptoms

Symptoms of cyanobacteria toxin poisoning in animals include lethargy, muscle tremors, fast breathing, twitching, paralysis, and convulsions. If you suspect your dog is suffering from cyanobacteria poisoning, contact your vet immediately.

For humans, if you have been in contact with water containing cyanobacteria, you may experience tingling or numbness around the fingertips and/or mouth, breathing difficulty, gastrointestinal symptoms, or skin rashes. If you feel any of these symptoms after contact with a waterbody, seek medical advice from your doctor or contact Healthline on 0800 611 116.

Last modified: 21 Dec 2023 2:03pm