As summer approaches, veterinarians in the UK are raising alarms about the dangers of blue-green algae, a toxic form of bacteria that can be deadly for dogs. Sean McCormack, Head Vet at Tails.com, emphasizes that while blue-green algae may resemble harmless green algae, it poses significant health risks. This bacteria can thrive in warm weather, often turning water a pea-green color. If ingested, it can lead to severe liver failure and other health complications. Common symptoms of poisoning include vomiting, lack of appetite, diarrhea, and in severe cases, seizures or collapse. Owners are advised to keep dogs away from potentially contaminated water and seek immediate veterinary help if exposure is suspected, as there is no antidote for blue-green algae poisoning. Prevention is key, and dog-friendly swimming options are recommended to avoid these risks.