Weever fish are found all around the coast of the United Kingdom in areas with warm shallow water and a sandy beach. The fish buries itself in the sand leaving only its head and black dorsal fin visible. The sting feels like a sharp stab and is very painful but will not leave any permanent damage. The best treatment is to place the affected foot in a bowl of hot water until the pain subsides.
Jellyfish can also be a potential hazard as they are occasionally found along the coast. If one stings you do not rub the affected area, as this will cause more pain. Spray the area with cold seawater and apply ice (if available).
However, if cattle or horses chase you and your dog, it is safer to let your dog off the lead - don't risk getting hurt by trying to protect it. Your dog will be much safer if you let it run away from a farm animal in these circumstances and so will you.
Everyone knows how unpleasant dog mess is and it can cause infections, so always clean up after your dog and get rid of the mess responsibly - 'bag it and bin it'. Make sure your dog is wormed regularly to protect it, other animals and people.