Blue-Green Algae: What Dog Owners Need to Know

When the sun's out, nothing beats a day at the lake, river, or pond with your dog. But warm weather also brings a hidden danger that can be life-threatening, blue-green algae.

Despite the name, blue-green algae isn’t actually algae it's a type of bacteria called cyanobacteria.

When conditions are right (heat, sunlight, stagnant water), it can multiply rapidly and form a toxic bloom that’s harmful  and sometimes fatal  to dogs.

What It Looks Like

Blue-green algae can appear as:

• Green or blue-green scum on the surface of ponds or lakes
• Paint-like or oily appearance in the water
• Foam, mats, or clumps floating near the shore
• Strong musty or earthy smell

It’s often more common in summer and early autumn, especially in still or slow-moving water.

Why It’s So Dangerous

If your dog drinks, swims in, or even licks their fur after being exposed to contaminated water, they could ingest toxins that affect the liver, nervous system, or both.

• Early symptoms: Vomiting, diarrhoea, drooling, weakness, disorientation
• Severe symptoms: Tremors, seizures, difficulty breathing, collapse
• Fatal risk: Some toxins act within minutes — immediate veterinary care is critical

How to Keep Your Dog Safe

Here are simple ways to avoid danger during warm-weather walks or outings:

• Stick to clear, fast-moving water where blooms are unlikely
• Avoid any pond or lake with scum, green film, or foul odours
• Check local council websites or signs for blue-green algae alerts
• Bring your own water bowl and fresh water
• Don’t let dogs drink or swim in still water during heatwaves

Final Thought

A day by the water should be one of summer’s best joys — not a risk. With a little caution, you can keep your dog safe while still enjoying sunny adventures together.

P.S. NutriPaw supports your dog’s liver, immune system and overall resilience — especially important in high-risk seasons like summer.