19/08/2025
Be on the lookout for blue-green algae! ⚠️
Blue-green algae is highly poisonous, and can even be toxic to dogs. But what exactly is blue-green algae, what does it look like, and when & where are you most likely to come across it?
Blue-green algae is a term used to describe a group of bacteria, called cyanobacteria. It's most commonly found in non-flowing, fresh water such as lakes, ponds and rivers.
Hot weather can cause it to grow rapidly, and you may see this as a 'bloom' across the surface of the water. Other conditions can trigger it to thrive, so be aware of its presence at other times of the year as well.
Blue-green algae can look like:
- A blue-green scum has appeared on the surface of the water
- Green flakes, greenish bundles or brown dots in a pond, lake or stream
- A green, blue-green or greenish-brown paint on the surface of the water
- Foam around the edges of ponds and lakes
⛔ If in doubt, do NOT let your dog enter the water. ⛔
If your dog has entered water that you suspect may contain blue-green algae, you MUST get them to the vet immediately. Symptoms of poisoning and even fatality can occur within as little as 15 minutes.
