Cornwall Wildlife Trust is urging visitors to its Penhale Dunes nature reserve to act responsibly following an influx of dog waste being left behind and dogs being allowed off leads. 

The dunes are home to several unique and sensitive plant species, including rare plants and lichens like petal wort and scrambled egg lichen. These plants are highly vulnerable to environmental disturbance. Even small amounts of dog waste can be harmful, as it contains bacteria, parasites, and excess nutrients that disrupt soil chemistry.  Insecticides found in flea treatments and wormers are also excreted in dog waste, likely to cause harm to pollinators. Reserve officers are concerned that the rising levels of dog waste could lead to toxic conditions and upset the delicate balance of soil microorganisms, hindering plant growth and survival. 

During the summer holidays, many children visit and use the Penhale Dunes reserve. Dog waste can spread toxocariasis, an infection caused by small worms found in the faeces of some dogs, which can cause serious health issues. Bagging it and binning it is important for the safety of both wildlife and people. 

In addition, increasing numbers of dog owners are allowing their pets off leads in areas where sensitive wildlife have made their homes. Penhale Dunes is home to ground-nesting birds such as skylarks, which lay their eggs among the long grass. Uncontrolled dogs can disturb these birds, causing significant stress and often forcing them to flee their nests and abandon their chicks—who may then tragically die from starvation. 

Penhale Assistant Officer, Hannah Barnikel said: 

“We love dogs—but we love wildlife too. Dog poo doesn’t just look and smell unpleasant—it spreads harmful diseases and damages delicate ecosystems. 

“One small act, like picking up after your dog, makes a huge difference to our environment and to the sensitive flora and fauna found here in Cornwall.” 

Dog owners are encouraged to follow six key principles when visiting this beautiful natural site: 

1. Keep Your Dog in Sight and Under Control 
   Always keep your dog within sight and under control. Where signposted, please use a lead.
2. Clean Up After Your Dog 
   Always pick up after your dog. If bins aren’t available, please take the waste home with you.
3. Use a Lead Around Livestock and Nesting Birds 
   In areas with livestock or ground-nesting birds—especially from March to July—keep your dog on a short lead at all times.
4. Practice Reliable Recall 
   Your dog should respond to basic recall commands. If not, please keep them on a lead for the duration of your walk.
5. Stay on Designated Paths 
   Stick to marked trails to help protect delicate flora and fauna.
6. Respect Others 
   Be mindful of other visitors and their dogs. 

For more information on how to walk your dog responsibly and support local conservation efforts, please visit: Information for Dog Walkers | Cornwall Wildlife Trust