You're not imagining it, and you're not alone. Owners describe this all the time: “He was limping all week, and then he trotted into the clinic like a puppy.” Vets even have shorthand for a dog whose owner knows something is wrong: ADR, for “ain't doin' right.” We take it seriously.
Why does my dog act normal at the vet?
Because the clinic changes how your dog's body works. For many dogs, the vet is scary. In one study of 135 dogs, 78.5% showed fearful behavior during their exam [1].
Fear sets off the body's stress response, and that response includes a built-in painkiller. Scientists call it stress-induced analgesia. When an animal feels threatened, the nervous system turns down pain signals so it can get through the moment [2]. Adrenaline adds to the effect, temporarily numbing pain and making a sore dog look more mobile than they are at home [3].
The stress response is measurable. In a study of 22 retired racing greyhounds, blood pressure averaged 165 in the clinic but about 131 at home [4]. Same dogs, different setting. Cornell's Riney Canine Health Center makes the same point: a nervous dog at the clinic may not show the pain behaviors you see at home [5].
Why does my dog limp at home but not at the vet?
Three reasons, and I call them together the exam-room effect.
The warm-up. By the time your dog reaches the exam table, they've been awake for hours, walked to the car, and crossed the parking lot. Stiffness that's obvious at 6 a.m. has often loosened by the appointment.
The missing triggers. Pain often shows up only in certain moments, like climbing stairs, crossing slick floors, or getting up after a long nap [3]. A small exam room often misses those features or moments. And a mild limp often shows only at a trot, which is hard to see in a room a few steps wide.
The single day. Pain rises and falls with activity, time of day, and even weather [3]. Your vet sees one day, one brief snapshot. If it happens to be a good one, your dog can look better than they usually are.
How much of my dog's life does the vet actually see?
Very little. Two 30-minute checkups a year add up to one hour out of 8,760. That's about 0.01% of your dog's year. The other 99.99% happens at home, with you.
That's not a flaw in your vet. It's the limit of any snapshot. A careful exam gives your vet things no one else can get: feeling the joints, checking range of motion, and testing reflexes. What it can't show is the rest of your dog's life. That part is your job, and you're better placed for it than anyone. Owners know their dog's normal behavior and see them in a calm, familiar setting. That makes you an essential part of how vets assess long-term pain [6].
Does “fine at the vet” mean my dog isn't in pain?
No. A normal exam is good news, and it's real information. But it means your dog looked comfortable during that visit, not that they're comfortable at home.
So don't let a good exam talk you out of what you've seen. If the change you noticed keeps happening, it's still worth pursuing. Speaking up isn't being “that owner.” It's giving your vet the other 99.99%.
How do I show my vet what happens at home?
Bring evidence. I recommend documenting your dog's behavior with photos, videos, or written notes before the appointment [5].
- Film the moment it happens. The first get-up of the morning, the stairs, the car jump, or a trot toward and away from you. Hold the phone at your dog's height and record.
- Write a quick timeline. When did it start? How often does it happen? Is it worse in the morning, after exercise, or in cold weather?
- Bring your baseline notes. If you've been tracking your dog's normal, that record shows your vet how things have changed over weeks, not just today.
- Ask to see your dog move. Ask whether your vet can watch your dog walk in a hallway or parking lot, where there's room to trot.
- Time the visit. If the problem is morning stiffness, ask for the earliest appointment you can get.
Can technology show my vet what happens at home?
Yes. That's the gap we built it to close. The Ruff, Tether's collar-mounted device, compares your dog to their own individualized baseline during the 99.99% of life your vet doesn't see: the 6 a.m. get-ups, the restless nights, the walks that slowly get shorter. It puts changes in context, so those aches get noticed, tracked and treated. It organizes weeks of home life into a report written the way vets document patients. It doesn't diagnose, and it doesn't replace the exam. It makes sure your vet sees more than a single good day. Helping you be the best advocate your best friend can have.
“Every clinical claim The Ruff makes crosses my desk before it reaches you. I hold it to the standard I'd want for my own dogs, because that's exactly what yours deserve.”
Know before they show. Animals speak to those who listen.
Dr. Zachary L. Pollack, DVM, MRCVS
- Döring D, Roscher A, Scheipl F, Küchenhoff H, Erhard MH. Fear-related behaviour of dogs in veterinary practice. Vet J. 2009;182(1):38-43. doi:10.1016/j.tvjl.2008.05.006.
- Butler RK, Finn DP. Stress-induced analgesia. Prog Neurobiol. 2009;88(3):184-202. doi:10.1016/j.pneurobio.2009.04.003.
- Walsh S. Understanding the link between canine pain and problem behaviours. Veterinary Ireland Journal. February 2025.
- Marino CL, Cober RE, Iazbik MC, Couto CG. White-coat effect on systemic blood pressure in retired racing Greyhounds. J Vet Intern Med. 2011;25(4):861-865. doi:10.1111/j.1939-1676.2011.00735.x.
- Cohen A. Recognizing Pain in Dogs. Cornell Richard P. Riney Canine Health Center. vet.cornell.edu. Updated October 21, 2025.
- Walsh K. Chronic pain management in dogs and cats. In Practice. 2016;38(4):155-165. doi:10.1136/inp.i1489.