A cough that appears at night is hard to demonstrate in a daytime consult room, which is exactly why home observations carry so much weight here. The vet cannot hear the cough you hear at two in the morning, so your description of its sound, its triggers, and the dog around it becomes the evidence the examination builds on. Record those details across a few nights, and capture the cough itself on your phone if you can, because an accurate picture of a night cough is often what separates a watch-and-wait plan from tests booked straight away.
The Sound of the Cough
Describe the cough by its character, not just its presence. A dry cough sounds harsh and empty, a honking cough has a goose-like blast to it, a wet cough sounds loose and rattly, and a productive cough ends with the dog bringing something up, swallowing, or retching. Note which of these fits best, whether episodes come singly or in bouts, roughly how long a bout lasts, and whether the dog settles afterwards or stays restless. Record what happens at the very end of a bout, since a final gag or retch is a detail owners often forget to mention and vets specifically ask about. If the sound changes across the nights you record, say so, because a cough that is becoming wetter or more frequent is a different report from a stable one.
Triggers and Timing
Note what sets the cough off. Lying down at night is the trigger in the question, so record whether the cough starts soon after the dog settles, wakes the dog from sleep, or builds toward morning. Alongside it, watch for excitement, such as greeting, play, or the doorbell; cold air on a late walk; and pressure on the lead or collar during walks, where a pull forward reliably produces coughing. Record the room and routine too: whether the cough happens in one sleeping place and not another, and whether anything in the evening changed around when it started. A trigger list this specific lets the vet test ideas against the pattern instead of starting from nothing.
Breathing, Exercise, and the Whole Dog
Between episodes, observe the dog at rest. Breathing effort at rest matters most: note whether the dog breathes comfortably while asleep or whether the chest and belly work visibly, the nostrils flare, or the dog prefers to sit up or stretch the neck out rather than lie flat. Record exercise tolerance on ordinary walks, comparing like with like — the usual route finished easily, finished slowly, or cut short with coughing or lagging. Add appetite and energy through the day, plus anything else that has changed, such as drinking, weight, or tolerance of stairs. These whole-dog observations show whether the cough travels alone or as part of a wider change, which is a distinction the vet will build the plan around.
Recordings and Red Flags
A phone recording is genuinely useful here, not a nice extra. Audio captures the sound character better than any description, and a short video shows the body effort, the bout pattern, and the ending retch if there is one. Record whole episodes where you can, note the time, and keep the clearest two or three rather than an album of fragments. Bring the written notes with them: sound, triggers, resting breathing, exercise tolerance, appetite, and energy, dated night by night. Infection, airway trouble, and heart problems can all produce a night cough and are possibilities only a vet can distinguish, so the article you bring is evidence, not a verdict. Some signs bypass the appointment wait entirely: laboured breathing at rest, pale or blue gums, or collapse at any point mean urgent veterinary care the same night, recording or no recording.
KinsLe's Pet Passport holds these night-by-night notes and recordings alongside the wider health records, so a second vet or an emergency clinic sees the same history you described.