The Liver

The liver is one of the hardest-working organs in your dog’s body. It helps with digestion, filters toxins from the blood, produces important proteins, and stores energy. Because the liver has many jobs, problems with it can affect your dog’s overall health in a big way.

Common liver problems in dogs include:

• Hepatitis (inflammation of the liver)
• Liver shunts (abnormal blood flow around the liver, more common in certain breeds)
• Fatty liver disease, often linked to obesity
• Toxic damage from certain medications, plants, or chemicals
• Chronic liver disease that develops slowly over time

Signs of liver trouble include:

• Yellowing of the skin, eyes, or gums (called jaundice)
• Loss of appetite
• Weight loss
• Increased thirst and urination
• Vomiting or diarrhea
• Swollen belly
• Confusion or disorientation (in serious cases)

What you can do:

• Keep harmful substances like certain human foods (grapes, raisins, xylitol), toxic plants, and medications not prescribed by your vet away from your dog
• Maintain a healthy weight — obesity is a major risk factor for liver disease
• Feed a balanced, complete diet appropriate for your dog’s age and health
• Keep up with routine bloodwork at vet visits — the liver can be affected silently, and blood tests can catch problems early
• If your dog has been diagnosed with a liver condition, ask your vet about a prescription liver support diet

Watch for any of the signs listed above and contact your vet promptly if they appear.

The Lungs

Your dog’s lungs bring oxygen into the body and push out carbon dioxide. Healthy lungs are essential for energy, exercise, and overall well-being.

Common lung conditions in dogs include:

• Pneumonia (infection of the lungs)
• Chronic bronchitis
• Lungworm (a parasitic infection)
• Fluid in the lungs, often related to heart disease

Signs of lung problems include:

• Persistent coughing
• Difficulty breathing or breathing faster than normal
• Wheezing
• Blue or gray tint to the gums (this is an emergency)
• Exercise intolerance (tiring easily)

What you can do:

• Keep your dog up to date on parasite prevention, including heartworm prevention — heartworms can damage the lungs
• Avoid exposing your dog to secondhand smoke or heavy air pollution
• Monitor your dog’s resting breathing rate (15-30 breaths per minute is normal)
• Contact your vet right away if your dog is having trouble breathing

The Brain and Nervous System

The brain controls everything your dog does — movement, behavior, memory, and more. The nervous system carries signals between the brain and the rest of the body.

Common conditions include:

• Epilepsy (seizures)
• Cognitive Dysfunction Syndrome (CDS) — similar to dementia in people, more common in senior dogs
• Intervertebral disc disease (IVDD) — affects the spinal cord, common in Dachshunds and Corgis

Signs to watch for:

• Seizures or sudden collapse
• Confusion or disorientation
• Changes in behavior or personality
• Loss of balance or coordination
• Weakness in the legs
• In senior dogs: getting lost in familiar places, staring at walls, changes in sleep patterns

What you can do:

• Keep your dog mentally active with puzzles, training, and playtime — this supports brain health
• Maintain a healthy weight to reduce stress on the spine
• Watch for any sudden changes in behavior or movement and report them to your vet
• Senior dogs should have more frequent vet checkups to monitor for signs of cognitive decline

The Digestive System (GI Tract)

The gastrointestinal (GI) tract — from the stomach to the intestines — breaks down food and absorbs nutrients. It also plays a major role in the immune system. In fact, scientists estimate that 70-90% of the immune system lives in the gut!

Common GI issues in dogs include:

• Vomiting and diarrhea
• Inflammatory Bowel Disease (IBD)
• Gastric Dilatation-Volvulus (GDV/Bloat) — a life-threatening emergency, especially in large breeds
• Food sensitivities or allergies
• Intestinal parasites (worms)

Signs of GI trouble include:

• Signs of GI trouble include:

  • Vomiting or diarrhea (especially if it lasts more than 24 hours)
  • Blood in the stool or vomit
  • Loss of appetite or sudden weight loss
  • Bloated or swollen belly
  • Excessive gas or gurgling sounds from the stomach
  • Lethargy or seeming “off”
  • Straining to go to the bathroom
  • When it’s an emergency: Gastric Dilatation-Volvulus (GDV), also called bloat, is a life-threatening condition where the stomach fills with gas and twists. Signs include a swollen belly, unproductive retching, and restlessness. This requires immediate emergency veterinary care.

  What you can do:

  • Feed your dog a complete and balanced diet — this supports both digestion and immune health
  • Avoid sudden changes in your dog’s food; transition slowly over 7–10 days
  • Make sure your dog always has access to fresh, clean water
  • Consider a canine probiotic to support healthy gut bacteria — always check with your vet first
  • Keep up with regular deworming and parasite prevention according to the region.
  • Watch portion sizes and avoid feeding large meals right before or after exercise, especially in large breeds
  • Report any lasting changes in eating habits, stool, or energy to your veterinarianRemember, if your dog is showing any of these signs, always consult your veterinarian for a proper diagnosis and treatment plan.

Source: Animal Wellness Magazine