This is how dangerous blue-green algae could be to your dog - as vet shares warning signs to look out for

• Blue-green algae is a toxic substance commonly found in still or slow-moving freshwater during warmer months.
• In some cases, exposure to blue-algae can be fatal.
• Sean McCormack, Head Vet at Tails explains how to identify blue-green algae and why it’s so dangerous.

With the warm weather, many of us are heading outside with our dogs to make the most of the sunshine.

While it might be tempting to let your dog cool down in a nearby lake or stream, it’s important to be aware of the potential risks associated with freshwater environments.

Blue-green algae, is a toxic substance that is commonly found in still or slow-moving freshwater during warmer months and has been responsible for numerous dog fatalities in recent years.

In response to these dangers, Sean McCormack, Head Vet at Tails.com, explains how to identify blue-green algae, symptoms of blue-green algae poisoning and why it poses such a serious health risk to dogs.

What is blue-green algae?

Blue-green algae is a type of bacteria known as cyanobacteria. In many cases, it isn’t visible to the naked eye, however, when blue-green algae blooms and forms clumps. It can often be recognised by the water taking on a distinctive pea-green, soup-like appearance.

If you come across water affected by blue-green algae, it is generally best to avoid contact, for both people and pets. While not all blue-green algae is toxic, certain strains can produce harmful substances that may cause skin irritation, nausea, vomiting, or more serious health issues if ingested or inhaled.

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Why is it dangerous to dogs?

While it may not look particularly threatening, blue-green algae can be extremely toxic to dogs if they swim in it or drink contaminated water.

This is due to the harmful toxins produced by blue-green algae blooms, which can interfere with a dog’s liver function.

In some cases, exposure to the bacteria can be fatal, or cause serious long-term health problems.

If you’re planning to take your dog swimming or walking near open water this summer, it’s important to stay vigilant. Avoid letting them come into contact with any water that may look suspicious.

Even if you're unsure whether the green substance is blue-green algae, it’s better to be cautious than risk your dog’s health.

For a safer alternative, consider visiting a dog-friendly swimming pool or lido where the water is regularly checked and treated, allowing your dog to enjoy a splash without the added risk.

What are the signs and symptoms of blue-green algae poisoning in dogs?

When dogs come into contact with blue-green algae, they may display some of the same symptoms as humans, such as vomiting. However, the effects on dogs can be significantly more severe.

The most common symptoms include:

• Vomiting
• Loss of appetite
• Diarrhoea
• Seizures or fitting
• Weakness, collapse, or unconsciousness
• Disorientation or confusion
• Excessive drooling
• Difficulty breathing

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What should you do if your dog has came into contact with blue-green algae?

If you suspect your dog has come into contact with blue-green algae or ingested contaminated water, it’s vital that you seek care from your vet immediately, as poisoning in dogs can be fatal.

Blue-green algae can cause fatal liver failure, so prevention is always the best approach. If you suspect a body of water may be contaminated, avoid it altogether to protect your pet.

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