Dogs can have a lot of safe fun, but never let a dog go into water that you don’t know. Hidden hazards include débris, currents, tangling weed and pollutants. be especially careful of water that is an unusual colour; toxic algae can turn water turquoise, green, blue, red and brown and can be fatal to dogs and humans. Seawater can make a dog’s skin dry and flaky and the coat dull, particularly if they are susceptible to skin irritations. Always rinse off seawater with freshwater and make sure that your dog does not drink it. Seawater can be polluted and contain harmful flotsam especially after heavy rains when sewage may have been discharged directly from outflows.
Rivers can be dangerous at low tide as mud can engulf dogs and humans very quickly.
Use a harness and a long line so that you can control your dog at all times and if you do get into trouble, contact the coastguard on 999.