Dog Symptom Checker: Find Out What Is Wrong With Your Dog

Common Dog Illness Symptoms

These are the symptoms owners most often search for. Most are covered by the checker above.

• Vomiting — occasional vomiting is common and usually minor; repeated vomiting, blood, or vomiting alongside lethargy needs a vet
• Diarrhea — soft stool for one day is often dietary; watery, bloody, or prolonged diarrhea is not
• Lethargy — a dog sleeping more than usual or unwilling to move is one of the most reliable early signs of illness
• Loss of appetite — skipping one meal can be normal; refusing food for more than 24 hours is worth investigating
• Excessive drinking and urination — classic signs of diabetes, kidney disease, or Cushing disease
• Coughing — a dry honking cough is often kennel cough; a wet productive cough may indicate pneumonia or heart disease
• Limping — sudden non-weight-bearing lameness needs same-day attention; gradual stiffness is more often joint disease
• Bloated or swollen abdomen — in large deep-chested dogs, bloating with restlessness and unproductive retching is a life-threatening emergency
• Pale or white gums — always an emergency regardless of other symptoms
• Seizures — a first seizure always needs veterinary evaluation; a seizure lasting more than five minutes is an emergency

What Is the 3 3 3 Rule for Dogs?

The 3 3 3 rule is a guideline used by rescue and adoption communities to describe how long it typically takes a newly adopted dog to adjust to a new home.

• First 3 days — the dog is overwhelmed and may hide, refuse food, shut down, or seem depressed. This is normal decompression, not a sign of a bad match.
• First 3 weeks — the dog starts learning the routine, relaxing, and showing its real personality. Some problem behaviors may emerge as it settles in.
• First 3 months — the dog feels truly at home, bonds fully, and settles into a predictable pattern.

The rule is useful for setting expectations after adoption. A dog that seems anxious or withdrawn in the first few days is not necessarily unwell. However, if a dog refuses food for more than 48 hours, shows signs of physical illness, or seems in pain rather than just stressed, use the symptom checker above rather than assuming it is adjustment.

What to Feed a Sick Dog With No Appetite

A dog that is unwell and not eating needs gentle, easily digestible food rather than its normal diet. The standard approach vets recommend:

• Bland diet — plain boiled chicken breast (no skin, no seasoning) with plain white rice in a roughly 1:3 ratio (chicken to rice). Feed small amounts every few hours rather than one large meal.
• Plain boiled or mashed pumpkin — helps with both diarrhea and constipation due to its fiber content. A tablespoon or two mixed into the bland diet is enough.
• Bone broth (low sodium, no onion or garlic) — poured over food or offered alone encourages a dog to eat and helps with hydration.
• Baby food — plain meat flavors (chicken or turkey, no onion or garlic in the ingredients) are often accepted by dogs that refuse everything else.
• Fresh water — always available; dehydration from vomiting or diarrhea is often the most urgent concern in a sick dog.

Do not offer dairy, fatty foods, seasoned meats, grapes, raisins, onions, garlic, or xylitol in any form. If your dog refuses all food and water for more than 24 hours, or if the lack of appetite is paired with vomiting, diarrhea, or lethargy, see a vet rather than continuing to try different foods at home.

Transition back to the normal diet gradually over 3 to 5 days once your dog is eating and holding food down, mixing increasing amounts of regular food into the bland diet each day.