With sunshine finally arriving in many parts of the UK, Dogs Trust is warning dog owners that too much exercise in warm weather – even as mild as those forecast for this weekend – can cause severe health problems for our canine companions.

While most dog owners will be aware that extreme weather and heatwaves can be dangerous for dogs – sometimes even deadly – many will be unaware that exercising dogs in early summer temperatures can cause heatstroke in dogs. In some cases, heatstroke can prove fatal.

A recent study showed that nearly 75% of cases of heat-related illness in UK dogs were because of exertion, and over two thirds were just from walking only.

Brachycephalic, or “flat-faced”, breeds such as English Bulldogs, Pugs and French Bulldogs, are especially vulnerable in hot weather.

Recent research from the Royal Veterinary College (RVC) in collaboration with Nottingham Trent University found that English Bulldogs are 14 times more likely to suffer heat-related illness compared to Labrador Retrievers. Over a third of owners of flat-faced dogs reported that heat regulation is a problem for their pet.

The symptoms of heatstroke can include panting heavily, drooling excessively, appearing lethargic, drowsy or uncoordinated, vomiting, diarrhoea, and collapsing.

Paula Boyden, veterinary director of Dogs Trust, said: “After weeks of rain, it’s great to see the sun shining, and many of us will be taking advantage of it to enjoy the great outdoors. And with over a third of households now shared with a dog, we have no doubt that people will be keen to take their dogs along to join in the fun.

“But, while most of us know not to walk or exercise dogs in extreme weathers, even these lovely early summer temperatures can cause problems, especially for those dogs with flat-faces or underlying health conditions.

“As owners, we need to know the signs that our dogs are getting too hot and help them take a rest and cool down when they need to. Some dogs aren’t good at self-regulating and may continue to run and play even though they’re hot and tired, which increases their risk of heatstroke.

“If you do spot the signs of heatstroke in your dog, take steps to cool them down and contact your vet immediately.”