When Should You Take Your Dog to the Vet?

See a vet immediately (same day or emergency)

• Collapse, severe weakness, or inability to stand
• Difficulty breathing, or breathing that's rapid and labored
• A swollen, distended, or hard abdomen, especially with unsuccessful attempts to vomit
• Pale, white, or blue-tinged gums
• Repeated vomiting (more than two or three times within a few hours)
• A seizure, or any sudden loss of coordination
• Straining to urinate with little or no urine produced
• Heavy bleeding that doesn't slow with gentle pressure
• Known or suspected ingestion of a toxin, medication, or foreign object
• Any serious trauma — being hit by a car, a fall, a dog fight

Call your vet the same day, even if it's not an emergency

• Vomiting or diarrhea that continues past 24 hours
• Noticeable lethargy or a big change in behavior that lasts more than a few hours
• Limping that doesn't improve with rest, or any visible swelling
• Loss of appetite for more than a day
• Eye problems — squinting, redness, or discharge (eyes can go from mild to serious quickly)
• A wound that's deep, won't stop bleeding, or came from another animal

Usually safe to monitor for a day

A single episode of vomiting or soft stool in an otherwise normal, playful dog with a good appetite. Mild, short-lived lethargy after a long walk or a vaccine. A small, shallow scrape that's already stopped bleeding.

"Monitor" doesn't mean ignore — keep an eye on appetite, energy, and whether things are improving or getting worse over the next several hours.

Age and breed change the math

Puppies and senior dogs have much less reserve to handle vomiting, diarrhea, or not eating — what's a 'wait and see' in a healthy adult dog can become serious much faster in a very young or very old one, mainly because of dehydration risk. Brachycephalic (flat-faced) breeds like Bulldogs, Pugs, and Boxers also have a lower threshold for breathing-related concerns.

When in doubt, call

You know your dog's normal behavior better than anyone. If something feels seriously wrong, trust that instinct and call your vet or a nearby emergency animal hospital to describe what you're seeing — most clinics are glad to help you figure out over the phone whether it can wait.