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Dehydration occurs when a dog loses more fluids than it takes in. Dogs can lose water through panting, breathing, urination, defecation, vomiting, and even through their paw pads.
A dog's ability to control their body temperature diminishes as dehydration progresses.
Dehydration disrupts the balance of electrolytes, which are essential for a dog's health. Dogs with dehydration often have reduced sodium, chloride, and potassium levels. These electrolytes are crucial for transporting nutrients into cells, supporting muscle function, and maintaining nerve activity.
Signs Of Dehydration In Dogs
Here are some quick tests and observations to check if your dog might be dehydrated.
Skin Pinch Test
Check your dog's skin elasticity by gently pulling up some loose skin at the back of its neck or over the shoulder blades and then releasing it. The skin should quickly return to its original position in a well-hydrated dog. If the skin takes longer to fall back and appears tented, your dog may be dehydrated.
Tacky, Dull Gums
If your dog allows it, look inside its mouth. Healthy gums should be pink, shiny, and moist. If they feel sticky to the touch, this indicates dehydration.
Dry Nose
A healthy dog's nose should be moist. A dry nose can indicate dehydration or other medical issues, such as a skin infection.
Thick, Stringy Saliva
Normal dog saliva is thin and watery. Dehydrated dogs often have thick, ropey saliva that sticks to their mouth.
Sunken Eyes
Severe dehydration can cause the fluid in the fat pads behind the eyes to diminish, making the eyes appear sunken.
Decreased Energy Level (Lethargy)
Dehydrated dogs may become weak and lethargic, showing little interest in playing, running, or jumping. They conserve energy to prevent worsening dehydration.
Excessive Panting
Dogs pant to cool down, but excessive panting can be a sign of dehydration, pain, anxiety, or a chronic condition like Cushing's disease. If your dog is panting more than usual, consult your vet.
Cause Of Dehydration In Dogs
Dehydration in dogs can occur for various reasons. Here are some of the most common causes:
Heatstroke
Heatstroke happens when a dog's body temperature exceeds 105.8°F (41°C) due to extreme heat exposure. This can result from being trapped in a hot vehicle, intense exercise, or continuous seizure activity.
Never leave your dog in an enclosed vehicle, even if the outside temperature is only 60°F. Dogs can develop heatstroke in a closed vehicle within 15-20 minutes, even with the windows slightly open. Overweight dogs and brachycephalic (short-muzzled/flat-faced) breeds are particularly susceptible, but all dogs are at risk. Leaving your dog at home, even for short errands, is best if you can't keep your car cool and provide water.
Persistent Vomiting and Diarrhea
Continuous vomiting and/or diarrhea can cause significant fluid loss. If a dog experiences these symptoms for 24 hours or more, they should be taken to a vet immediately. Dogs cannot replenish fluids quickly enough through drinking alone and will become severely dehydrated without prompt treatment.
Insufficient Water Intake
Dogs need a consistent supply of water to meet their daily requirements. Ensure that their water bowls, both indoors and outdoors, are always filled with fresh, clean water.
Chronic Illness
Dogs with conditions such as kidney disease, Cushing's disease, or diabetes often struggle with dehydration and may drink more water than usual. Despite increased water intake, they may still be dehydrated. Ensure that water is always accessible, and consider feeding them canned food to boost their fluid intake.
If your dog starts drinking and urinating more than usual or has urinary accidents indoors, schedule a vet appointment to identify the underlying cause.
Symptoms Of Dehydration In Dogs
Here are some symptoms that may indicate your dog is dehydrated:
- Excessive panting
- Rapid, short, and staccato-like breathing
- Dry nose, mouth, and gums
- Sticky mucous membranes
- Tired and sluggish appearance
- Reduced activity level and slowed responses
- Apprehensive behavior
- Diminished mental alertness
- Altered level of consciousness
- Sunken or dry eyes
- Dull corneas
- Reduced skin elasticity
- Pale gums that remain white when pressed
- Loss of balance
- Unsteady walk
- Weakness in the rear legs
- Loss of appetite
- Weak pulse
- Heart rate over 140
- Decreased urine output
- Dark-colored urine
- Strong urine odor
- Hypovolemic shock (shock due to fluid loss)
- Low blood pressure (hypotension)
Diagnosis Of Dehydration In Dogs
If you think that your dog is dehydrated, you can use the skin test. When a dog is dehydrated, their skin becomes less elastic. To test this, gently lift a small piece of skin on your dog's back. If the skin falls back slowly instead of snapping back within 1-2 seconds, your dog might be dehydrated. Another method is to press a finger on your dog's gums until the area turns white. When you release, the area should turn back to pink immediately. If it takes longer, dehydration could be the issue.
A thorough examination at the veterinary clinic can confirm if your dog is dehydrated. The Veterinarian will check for any underlying conditions causing the dehydration or leading to reduced food and water intake. It's important to inform the vet of any symptoms and unusual behaviors you've noticed. Blood samples may be taken for testing, and a urinalysis can assess the impact of dehydration on the kidneys. Depending on the suspected condition, additional tests such as X-rays, CT scans, or tissue and fluid samples may be conducted.
Treatment Of Dehydration In Dogs
Most dehydrated dogs require medical attention. To determine the cause of dehydration, a vet will conduct a full medical history review, physical exam (including body temperature, heart rate, and respiratory rate), and diagnostic tests (such as intestinal parasite check, abdominal x-rays, urinalysis, and routine bloodwork).
These tests help identify issues like heatstroke, causes of vomiting/diarrhea, and chronic illnesses such as kidney disease and diabetes.
Veterinarians treat dehydration by administering subcutaneous fluids (under the skin) or intravenous fluids (directly into a vein through an IV catheter). These fluids replace lost fluids and correct any electrolyte imbalances. The severity and cause of dehydration will determine the most appropriate fluid replacement method. Additionally, the vet will address the underlying cause of the dehydration.
Recovery Of Dehydration In Dogs
If treated promptly, the outlook for recovery from dehydration is positive. If you see that your dog showing signs of dehydration, gradually offer small amounts of water with electrolytes. If your dog can't keep the water down, let him lick ice. If he stops drinking entirely, contact your veterinarian immediately.
To prevent dehydration, always ensure your dog has access to fresh water. After exercise, prevent your dog from drinking too much water at once. Stay alert to the signs of dehydration and monitor your dog's behavior closely.
