Dog Won’t Eat: Causes, When to Worry, and When to Seek Care 

A decreased appetite—or not eating at all—is often one of the first signs that something may be wrong  with your dog. While some dogs may skip a meal occasionally, ongoing or sudden refusal to eat can  indicate an underlying issue that requires attention. 

Because appetite is closely tied to overall health, it’s important to monitor changes closely. 

Common Causes of Loss of Appetite in Dogs 

There are many reasons why a dog may stop eating, ranging from mild to more serious conditions. Common causes include: 

• Gastrointestinal upset (vomiting, diarrhea, nausea) 
• Dietary changes or picky eating behavior 
• Stress or environmental changes 
• Pain or discomfort 
• Dental disease or oral pain 
• Fever or infection 
• Toxin ingestion 
• Underlying conditions such as kidney disease, liver disease, or pancreatitis In some cases, loss of appetite may be the only noticeable symptom early on. 

When Should You Be Concerned? 

While missing one meal may not be unusual for some dogs, there are situations where not eating should  be evaluated by a veterinarian. 

You should seek care if your dog: 

• Has not eaten for more than 24 hours 
• Is also vomiting or has diarrhea 
• Appears lethargic or weak 
• Has signs of pain (panting, restlessness, hiding) 
• Is drooling or having difficulty chewing 
• Has weight loss or ongoing decreased appetite
• Is a puppy, senior dog, or has underlying health conditions 

A prolonged lack of food intake can lead to dehydration and worsening illness. 

How We Diagnose Loss of Appetite in Dogs 

At L&L Animal Urgent Care, we focus on identifying the underlying reason your dog is not eating. Diagnostics may include: 

• Bloodwork to assess organ function and check for infection 
• X-rays to evaluate for foreign material or other abnormalities 
• AFAST/TFAST ultrasound scan for further evaluation if needed 
• Additional testing based on symptoms 

Our goal is to determine whether this is a mild, temporary issue or something that requires more in-depth  care. 

Treatment Options 

Treatment depends on the underlying cause of your dog’s decreased appetite. 

Common treatments may include: 

• Anti-nausea medications 
• Fluid therapy to address dehydration 
• Pain management 
• Appetite stimulants in select cases 
• Treatment of underlying infections or conditions 
• Dietary recommendations or supportive feeding

More serious cases may require hospitalization and supportive care. 

When in Doubt, Give Us a Call 

If your dog isn’t eating, it’s often a sign that something isn’t quite right. When in doubt, it’s always best to  have them evaluated—especially if other symptoms are present. 

At L&L Animal Urgent Care, we provide same-day urgent care for dogs and cats—helping you get answers  and treatment when your pet needs it most.