Dog owners know they have had a good walk when their companion can't keep their eyes open in the car—like this dog, who recently went viral on Reddit.

The image, captioned "So exhausted that she doesn't even realize we are home," has amassed more than 5,300 upvotes in less than 24 hours. In the comments, the owner u/Plane-Reputation404 says that the rescue dog is suspected to be a mix of Portuguese Podengo, Dalmatian, and "other stuff"—all of which are energetic breeds.

It is unclear what they were doing before the car journey home, but one user wrote in the comments that a peacefully sleeping dog is a sign of a very good day.

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Another was able to relate, writing: "I do this and I'm a 37-year-old male. Weather permitting my boyfriend just leaves me in the car until I wake up lol [laugh out loud]."

How Long Are You Supposed To Walk Your Dog For?

Newsweek previously spoke to veterinarians about how long you should walk your dog for, based on its breed. Since the canine in the photo is asleep, we cannot gauge her size, but as the pup is a mix of two medium-to-large breeds, Dr. Grant Little recommended a 30- to 60-minute walk.

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Little, a veterinarian expert for the question-and-answer platform JustAnswer, said that dogs such as Labrador retrievers and Australian shepherds can often go for hourlong walks and feel little to no discomfort. He said: "Work on training early on, and be ready to identify if your dog is no longer able to keep up or if they seem to be experiencing pain or mobility issues."

On the other hand, smaller dogs that weigh less than 15 pounds, such as Chihuahuas, typically need about 20 minutes of exercise at a time. The canine's health and age should be considered, too, when determining the length of a walk.

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Newsweek also discussed with Dr. Kelly Diehl what to do if you over-walk your dog, which is sometimes not advisable.

Diehl, a senior director of science and communication at the Morris Animal Foundation, said: "If you're hiking and you're four miles from the trailhead and your dog collapses, this is a serious problem. As a veterinarian, I've seen dogs in the clinic who collapsed while exercising, and it can be life-threatening. If your dog is exhausted, carrying them in a backpack or using a stroller might be necessary."

Diehl added: "Providing food, water, and shelter can help a tired dog. Allowing rest also helps, but think of it like this—if you're tired, how much rest would you need to finish a long hike that you're not fit for? Avoiding these situations is really best—I can't stress that enough!"

Newsweek reached out to u/Plane-Reputation404 for comment. We could not verify the details of the case.

Do you have funny and adorable videos or pictures of your pet you want to share? Send them to life@newsweek.com with some details about your best friend, and they could appear in our Pet of the Week lineup.