Notice the pattern without testing your dog
Write down when the pacing starts and what else you notice: trouble settling onto a bed, panting, a need to go outside, new accidents or difficulty finding a familiar room. A short video may help your vet see what the behavior looks like. Include any changes in medication or routine when you speak with them. Don't change a prescribed treatment or add a supplement without asking the vet.
Meanwhile, make the night easier to move through. Keep a clear path to water and the door. If your dog's vision has changed, a gentle light may help them find their way. Make a comfortable resting spot easy to reach, especially if stairs or jumping have become hard. Stay with them if they seek you out, don't punish the pacing or confine a distressed dog just to quiet the house.
Why an old habit can change
Age-related cognitive problems can disrupt sleep and make some dogs restless at night. But that's not a diagnosis from a blog post. Arthritis and other physical conditions can also change how a dog rests. Your vet can examine the dog and help decide what to check, then whether a behavior or environment plan is useful.
Tonight, clear one safe path from your dog's bed to water and the place they normally ask to go out. Make a short note of the time the pacing begins and any other change you notice. Arrange a vet appointment rather than trying to train the pacing away.
The AI trainer can offer general behavior guidance after medical concerns have been checked. Sudden distress, collapse, trouble breathing or signs of significant pain need prompt veterinary advice, not a chat answer. After a veterinary check for pain and other causes, see the senior dog changes guide for more on adapting rest and routines in later life
Sources: VCA on senior cognitive changes. VCA on nighttime behavior.