5 Signs Your Pet Needs a Vet — Don't Ignore These

Pets can't tell you when something is wrong. What they can do is show you — through behavior, appetite, energy level, and dozens of small physical signs that most owners miss because they're easy to dismiss as "just a phase."

Here are five signs that mean it's time to call your vet. Not next week. Soon.

1. Changes in Water Intake or Urination

Drinking significantly more or less water than usual is one of the most reliable early warning signs of a serious problem. In dogs and cats, increased thirst paired with increased urination is a classic presentation of diabetes, kidney disease, and Cushing's disease — all of which are manageable when caught early and serious when caught late.

You know your pet's normal. If the water bowl is going down twice as fast as usual, or your cat has started missing the litter box after years of perfect habits, call your vet.

2. Sudden Changes in Appetite

A dog who skips one meal is probably fine. A cat who stops eating for more than 24 hours is not fine — cats who stop eating can develop hepatic lipidosis (fatty liver disease) remarkably quickly, and it becomes serious within 48–72 hours.

Any dramatic change — a previously food-motivated pet suddenly refusing meals, or a pet who normally has a moderate appetite becoming ravenous — warrants attention. Both directions can signal underlying issues ranging from dental pain to metabolic disease.

3. Labored or Rapid Breathing at Rest

A pet who is breathing hard, breathing fast, or working visibly to breathe while at rest needs to be seen urgently. This is not a "let's watch it" situation. Labored breathing at rest can signal heart disease, fluid in the lungs, severe anemia, or respiratory distress — any of which can deteriorate rapidly.

Note: panting in dogs after exercise or in heat is normal. Heavy breathing in cats is never normal. If your cat is panting — especially with their mouth open — treat it as an emergency.

4. Sudden Behavior Changes

A friendly dog who becomes aggressive, a cat who suddenly hides constantly, a normally active pet who stops playing — behavioral changes that happen abruptly and persist are often the first sign of pain or illness. Animals instinctively hide weakness, which means by the time they're showing behavioral changes, the underlying issue has usually been developing for a while.

Ask yourself: is this a consistent change over several days, or an isolated incident? Isolated incidents (skipping play because it's hot) are usually fine. Persistent changes that last more than two to three days warrant a call to your vet.

5. Vomiting or Diarrhea That Doesn't Resolve in 24 Hours

Single episodes of vomiting or loose stool happen. Dogs eat things they shouldn't; cats get hairballs. The concern is persistence. Vomiting or diarrhea that continues for more than 24 hours — especially with lethargy, blood in the stool or vomit, or loss of appetite — needs veterinary attention.

Dehydration is the immediate danger: pets who are vomiting and not drinking become dehydrated faster than you'd expect, especially in cats. If your pet can't keep water down for more than four to six hours, don't wait.

When in Doubt, Call

Most veterinary practices have a triage line or can give you guidance over the phone. When something feels off about your pet and you're not sure if it warrants a visit, call and describe what you're seeing. A five-minute conversation often gives you either the reassurance that it can wait or the confirmation that it can't.

The one thing that's always true with pet health: catching problems early costs less, causes less suffering, and produces better outcomes. Your instinct that something is wrong is almost always worth acting on.