Effects of Salt Water
If excess salt water accumulates in your dog’s intestines, it can cause “beach diarrhea.” Symptoms include drooling, nausea, vomiting and diarrhea (sometimes severe). There may also be blood or mucous in your dog’s feces.
Ingesting high concentrations of salt water can also raise the sodium levels in your dog’s bloodstream to unsafe levels. This is known as “hypernatremia.” It is a serious condition that may result in seizures, coma, and sometimes even death, due to swelling in the brain.
To limit the amount of water being swallowed, bring your dog in the shade every 15 minutes and provide fresh water.
Effects of Sun Exposure
Dogs with short hair, white fur and pink skin are most vulnerable to sun exposure. Just like people, dogs can burn, but human sunscreen can be toxic. It is best to use sunscreen specifically formulated for dogs or use a child-safe sun lotion approved by your vet.
Effects of Swimming
Swimming is also quite tiring, so be sure your dog doesn't overdo it. Don't allow your dog in the water if there are strong tides or rip currents. Because salt water may irritate your pet's skin and because your dog is an easy target for sea lice and jelly fish, be sure to rinse your dog thoroughly after a dip in the ocean.
Effects of Heat
Dogs can develop heat exhaustion if exposed to the heat for too long without shade. Be aware that running in the sand is tiring and can lead to exhaustion and leg sprains. Some dogs tend to over do it, especially when they have residual pent up energy. Keep in mind that dogs may over heat even when in the water.
Other Hidden Threats
Sand granules in the eyes may cause irritation, eye pain and redness. Should this occur, flush the eye with fresh water. If the eye does not get better, consult your vet, it may be a corneal ulcer. Also be sure to prevent your dog from eating sand, shells, starfish or stones. They can cause serious intestinal obstructions or upset stomach.