How long do I have to keep the log before it becomes useful?

For a sign that appears daily, seven to ten days is enough to show a trend. For an intermittent sign you need four to six weeks, because before that you do not have enough episodes to separate a real frequency from coincidence. If the sign is worsening quickly, or if you see breathing difficulty, blood or marked dullness, do not wait to finish the log: that situation needs assessing now.

Should I record the days when nothing happens?

Yes, with minimal effort: a single line with the date and the word nothing. Without the empty days you cannot calculate a frequency, and without frequency you cannot tell whether treatment is working. Many logs fail precisely here, because they are only updated on bad days and end up painting a far bleaker picture than reality.

My vet has no time to read everything I write. Is it still worth it?

It is, but it needs presenting differently. The full log is for you, the one page summary is for them. If you arrive with the numbers already worked out, for example eleven episodes in thirty days clustered in the days after a diet change, you get in thirty seconds what an unstructured conversation would not achieve in ten minutes.

How do I count breathing if the animal gets up as soon as I approach?

Do not approach. Resting respiratory rate is counted from a distance, watching the chest rise and fall while the animal sleeps, and one full rise and fall counts as one breath. If you cannot watch it live, film thirty seconds from across the room and count calmly afterwards. A figure taken from an animal trying to get away is comparable with nothing.

Can I use temperature to decide whether to go to the vet?

Not on its own. Temperature is a useful addition to the other findings, but an animal can be seriously ill with a normal temperature and can go past 39.5 degrees simply from running or being frightened. General demeanour, breathing, gum colour and willingness to drink and move all count for much more. When in doubt, phone and describe the whole picture rather than reporting a single number.

Health management20 minLevel: BeginnerUpdated on July 30, 2026

Keeping a symptom log your vet can actually use

What to record for each episode, how to take the basic measurements at home, and how to describe the symptoms people most often mix up.

Audience: Pet owners
Species: Dog, Cat, Rabbit
Scope: Valid everywhere

What you need before you start

Un posto solo in cui scrivere, sempre lo stesso, raggiungibile in tre secondi dal telefono
Una bilancia adatta al peso dell'animale, anche una pesapersone se lo tieni in braccio
Un cronometro, quello del telefono va benissimo, per contare atti respiratori e durate
Il nome e il dosaggio esatto dei farmaci che l'animale sta assumendo

Consulting time is short and memory is unreliable. Turning up and saying the dog has been off for a while forces the vet to rebuild everything through questions, and rebuilding out loud loses exactly the details that drive decisions: when it started, how often it happens, what triggers it, whether it is getting worse. A symptom log is not an emotional diary, it is the replacement of an approximate memory with a series of dated observations. This guide covers what to write down, what to measure, and how to describe the symptoms almost everybody confuses.

Why a vague log helps nobody

The most common sentence heard in practice is that the animal is sick now and then. On its own it supports no decision at all: now and then can mean twice a year or three times a week, and those two situations lead down completely different diagnostic paths. The details that change a diagnosis are almost always quantitative: how many times, for how long, in what relationship to meals, to exercise, to a dose of medication.

There is a practical reason too. Many signs are intermittent and simply do not appear in the consulting room: a mild lameness disappears with the adrenaline of the visit, a night time cough does not show up at midday, a seizure lasts under two minutes and no vet will ever witness it live. The log and a video shot at the right moment are often the only evidence that exists of what happens at home.

The six facts to record for every episode

A useful log is not long, it is complete. Six facts per episode cover almost everything, and they take under a minute to write if you know in advance what they are. Writing them straight away matters: after a few hours the exact time and the duration become estimates, and estimates made after the fact consistently exaggerate severity.

Date and time of the episode, not the moment you remembered it.
What you observed, in your own words and without interpretation: what you saw, not what you think it means.
How long it lasted, timed where possible, otherwise clearly labelled as an estimate.
The immediate context: how long since the last meal, whether there had just been exercise, whether the animal was alone, whether a drug had just been given.
What you did and how it ended: whether it resolved by itself, whether anything helped, how long recovery took.
A number, whenever one exists: episodes counted, breaths per minute, kilograms, millilitres of water drunk.

The one minute routine, step by step

Look at the clock before you do anything else
The start time is the first thing lost and the one thing you cannot recover. Start a timer if you can: the real duration of an episode is almost always much shorter than the perceived one, and that gap matters clinically.
Film it if the sign is visible
Twenty seconds is enough. Frame the whole animal, hold the phone steady and put the lights on if needed. Do not get too close: whoever watches needs to see posture, gait and breathing together.
Make the area safe and observe before intervening
If there is no immediate danger, move obstacles out of the way and let the episode run its course while you watch. Intervening at once erases the information about how it would have ended on its own, which is often exactly what the vet wants to know.
Count whatever can be counted
Number of retches, coughing fits, vomiting episodes. If the animal is at rest or asleep, count chest movements for fifteen seconds and multiply by four.
Write the six facts in the one place you always use
Same place, same order, every time. A log spread over phone notes, messages to yourself and a notebook in the kitchen is not a log, it is material that will have to be rebuilt again later.
Add the context before you forget it
Last meal, last medication, last walk, anything new in the household. These are the details that reveal correlations once the episodes start adding up.
Reread the log once a week
Five minutes to count episodes and see whether frequency is rising or falling. The weekly trend is what decides between waiting and booking, and it is invisible if you only ever look at one episode at a time.

The measurements you can take at home

Five home measurements cover most situations and need no special equipment. Take them when the animal is calm: a value recorded right after a run or during a fright is comparable with nothing. Always record the condition as well, meaning whether the animal was awake, asleep or had just come back indoors.

Indicative values for a healthy adult animal at rest. They exist to help you notice a shift, not to make a diagnosis: interpretation stays with your vet.
Measurement	Dog	Cat	How to take it
Resting respiratory rate	Under 30 breaths per minute	Under 30 breaths per minute	Count chest movements for 15 seconds and multiply by 4, while the animal sleeps
Resting heart rate	60 to 140 beats per minute	140 to 220 beats per minute	Hand on the chest behind the left elbow, count for 15 seconds
Rectal temperature	37.5 to 39.2 degrees Celsius	38.0 to 39.2 degrees Celsius	Lubricated digital thermometer, only if the animal tolerates it without a struggle
Capillary refill time	Under 2 seconds	Under 2 seconds	Press the gum until it blanches, count the seconds until pink returns
Water drunk in 24 hours	Over 100 ml per kg is excessive	Over 50 ml per kg is excessive	Weigh or measure the bowl at the start and end of the day, with no other water source available

Telling apart the signs people mix up

Some pairs of signs look very similar but lead to different diagnoses. Knowing in advance what to look for lets you record the deciding detail while the episode is still happening, instead of reconstructing it later with a nagging doubt.

Pairs of signs that are easy to confuse, and the detail that separates them.
Pair	What to watch	Why it matters
Vomiting or regurgitation	Presence of retching and abdominal effort, time since the meal, shape of what comes up	Vomiting is active and involves the stomach, regurgitation is passive and points at the oesophagus
Coughing or retching	The sound produced, neck position, whether anything is brought up at the end	Many owners describe as vomiting a cough that finishes with froth
Seizure or fainting	Stiffness and rhythmic movement, passing urine or drooling, recovery time	Fainting is brief with immediate recovery, a seizure leaves confusion for minutes
Lameness or reluctance to move	Whether weight bearing is reduced on one specific limb or everything slows down evenly	A single limb problem and diffuse pain need different investigations
Passing a lot of urine or passing it often	Volume each time, straining, vocalising, total volume across the day	Large volumes suggest a systemic problem, small volumes with straining are an emergency
Itching or pain	Whether the animal scratches and licks, or pulls away from contact at one specific spot	It points either towards dermatology or towards orthopaedics

What to bring on the day of the visit

A thirty page log handed over in the consulting room does not get read, not out of laziness but because the appointment lasts twenty minutes. Your job is to arrive with a one page summary and keep the detail ready in case it is asked for.

One page with the date of the first episode, the total count and the trend over the last four weeks.
The three most significant episodes written out in full, with time, duration and context.
The videos, already selected and in order, ready on the phone without hunting through the camera roll.
The exact list of medicines and supplements with dose and timing, including anything given without a prescription.
The measurements taken at home, each with its date next to it.
The three questions you want answered, written down before you go in.

Frequently asked questions

How long do I have to keep the log before it becomes useful?: For a sign that appears daily, seven to ten days is enough to show a trend. For an intermittent sign you need four to six weeks, because before that you do not have enough episodes to separate a real frequency from coincidence. If the sign is worsening quickly, or if you see breathing difficulty, blood or marked dullness, do not wait to finish the log: that situation needs assessing now.
Should I record the days when nothing happens?: Yes, with minimal effort: a single line with the date and the word nothing. Without the empty days you cannot calculate a frequency, and without frequency you cannot tell whether treatment is working. Many logs fail precisely here, because they are only updated on bad days and end up painting a far bleaker picture than reality.
My vet has no time to read everything I write. Is it still worth it?: It is, but it needs presenting differently. The full log is for you, the one page summary is for them. If you arrive with the numbers already worked out, for example eleven episodes in thirty days clustered in the days after a diet change, you get in thirty seconds what an unstructured conversation would not achieve in ten minutes.
How do I count breathing if the animal gets up as soon as I approach?: Do not approach. Resting respiratory rate is counted from a distance, watching the chest rise and fall while the animal sleeps, and one full rise and fall counts as one breath. If you cannot watch it live, film thirty seconds from across the room and count calmly afterwards. A figure taken from an animal trying to get away is comparable with nothing.
Can I use temperature to decide whether to go to the vet?: Not on its own. Temperature is a useful addition to the other findings, but an animal can be seriously ill with a normal temperature and can go past 39.5 degrees simply from running or being frightened. General demeanour, breathing, gum colour and willingness to drink and move all count for much more. When in doubt, phone and describe the whole picture rather than reporting a single number.

What to do next

Pick one place to write, record date, observation, duration, context, outcome and a number for every episode, and film the sign whenever it is visible. Take the five home measurements while the animal is calm, reread the log once a week, and arrive at the appointment with a one page summary, the videos already selected and three written questions.