What should I include in my pet's health record?

Weight, appetite and water intake, medications you actually gave (not the ones that were scheduled), symptoms with the date they started, what the vet said at each visit, the dates of preventive care, and a photo of anything visual like a lump or a limp. That covers almost every question an appointment will raise.

How often should I record my pet's weight?

Often enough to see a trend and rarely enough that you keep doing it — for most healthy adult pets that is monthly. Puppies, kittens, seniors and any animal being treated for something usually need it more often; ask your vet what interval fits your pet rather than following a general rule.

What should I bring to a vet appointment?

Dates, doses, the trend, and video. When something started, what you have been giving and how much, how the weight has moved, and a clip of the limp or cough that never happens in the exam room. What not to bring is your own diagnosis — describe what you observed and let the vet interpret it.

How do I stop double-dosing my pet in a multi-person household?

Log the dose that was given, not the dose that was scheduled, and put the log somewhere everyone can see. A checklist of intended doses answers a different question from the one that matters at 8pm, which is "has anyone already done this?" A shared record turns that from a conversation into a glance.

Do I need an app to keep a pet health record?

No. Paper works, and a notebook you actually use beats an app you do not. An app earns its place in two situations: when more than one person cares for the animal and the record has to be shared, and when you want the history to survive a lost or replaced phone.

Why Pet Health Records Matter: What to Track, How Often, and What Your Vet Actually Asks For

Every vet visit contains the same moment. You describe the problem, and the vet asks the obvious follow-up:

"When did that start?"

And you genuinely do not know. Two weeks ago? Three? It was definitely before the long weekend, or maybe just after. You are not being careless — you are being asked to recall a slow change against a background of ordinary days, which is the one thing human memory is worst at.

A written record answers that question in four seconds. That is the entire argument, and everything below is detail.

This is a guide to keeping records, written by the team that builds Memofu's health log. It is not veterinary advice — for anything about your pet's health, ask your vet.

Why does a written record beat a good memory?

Because the changes that matter most are the ones designed to be invisible.

An acute problem announces itself; you do not need notes to remember the day your dog ate a sock. The changes that quietly matter are gradual: eating slightly less, drinking slightly more, a stiffness on the stairs that you adjusted to without noticing you were adjusting. You see your pet every day, which is exactly why you are the worst-placed person to notice a slow trend in them.

A record turns that around in three ways.

It converts feeling into evidence. "She seems to be drinking more" is a hunch. "She has emptied the bowl by mid-afternoon every day for the last nine days, and used to leave half" is an observation your vet can work with.

It fixes the timeline. Onset dates change what a symptom means. The same limp is a different conversation at three days and at three months, and you will not reconstruct that later.

It survives the appointment. Most of what a vet tells you evaporates within a day — especially when you are worried, which is most of the time. A note taken in the room is the difference between following the plan and half-remembering it.

What should a pet health record actually contain?

Seven things. Nothing about this needs to be elaborate; a line of text and a date is a complete entry.

Weight. The most information-dense number you can take at home. Covered below.

Appetite and water. Not grams — just "normal / less / more" and a note when it changes. Water especially, because increases are gradual and easy to rationalize.

Medications you actually gave. The single most valuable field in the whole record, and the one most often kept wrong. See the section below.

Symptoms, with the date they started. One line, plain description, no interpretation. "Coughing after drinking, started 12 Mar." The date is the part that matters.

What the vet said. Written in the room or in the car, not that evening. The diagnosis in their words, the plan, the dose, and what should happen next.

Preventive care dates. Vaccinations, parasite prevention, dental cleanings — the date each one happened. Record the dates and follow the schedule your vet sets; intervals differ by pet, region and product, so this is a place to write down what was done rather than to decide what should be.

Photos and video of anything visual. A lump, a limp, a patch of skin, the way they hold a paw. A photo taken today is comparable with one taken in a month; "it looks a bit bigger" is not. This is also the only reliable way to show a vet a symptom that never appears in the exam room.

How often should you record each thing?

Cadence is where most record-keeping dies. Too often and it becomes a chore; too rarely and there is no trend to read.

What	How often
Weight	Monthly for most healthy adults; more often for puppies, kittens, seniors and any pet under treatment — ask your vet
Appetite and water	Only when it changes
Medication given	Every dose, at the moment you give it
Symptoms	The day you first notice, then when it changes
Vet visits	Every visit, before you leave the car park
Preventive care	Each time, date only
Photos of a visible problem	At first sight, then weekly while it lasts

Notice how much of this is "only when it changes". A health record is not a diary. Most days have nothing worth writing, and a system that demands a daily entry is a system you will abandon in a fortnight.

Why is weight the most useful number?

Because it is objective, free, and moves before most other signs do. Vets weigh your pet at every single visit for a reason, and gradual weight change is an early signal for a long list of conditions in dogs and cats.

Two things worth knowing, and then we will hand you off:

A single weight is nearly meaningless. Weight is only useful as a trend. One reading tells you almost nothing; twelve across a year tell you a great deal.
An unplanned change of around 10% of body weight is a common rule of thumb for "mention this to your vet" — on a 4kg cat that is 400g, an amount nobody detects by eye under the fur.

The practical side — how to weigh a wriggling animal at home, what to do about pets too small for a bathroom scale, and a printable log — is covered properly in our gotcha day and weight tracking primer. No point writing it twice.

What does your vet actually want to see?

Four things, and they are not the four most people bring.

Dates. When it started, when it changed, when you last gave the medication. This is the single highest-value thing you can arrive with.

Doses, as given. Not the prescription — what actually went in, and when.

The trend. Three weights over three months beats one weight today. Direction and speed carry more meaning than any single reading.

Video. The cough, the limp, the odd gait, the seizure. These almost never happen in a consulting room, and a fifteen-second clip on your phone is worth more than the most careful description.

And one thing worth leaving at home: your own diagnosis. It is a very human instinct to arrive having read about a condition and to narrate the symptoms in its direction — but it filters what you report before the vet hears it. Describe what you observed. Let them interpret it. That is the part you are paying for.

Why do medication records fail, and how do you fix it?

Because most people log the wrong thing.

The natural instinct is to write down the schedule: one tablet, twice a day, fourteen days. That is a plan, and it answers "what should happen". It does not answer the question you actually have at eight in the evening, which is "has anyone already done this today?"

Log the dose you gave, at the moment you give it. One tap, one timestamp. Now the record answers the real question, and it answers it for everyone in the house.

That "everyone" is the crux. In a single-person household you can get away with memory most of the time. In a household of two or more, the failure mode is structural rather than forgetful: two people who each did the responsible thing, neither of whom knew about the other. The tablet gets given twice, or — more often, and more quietly — not at all, because each person assumed the other had it covered.

The fix is not a better memory or a stricter rota. It is a shared, visible log of what was given. It takes the question out of the realm of conversation, which is where it goes wrong. We wrote about how shared records change a household in our piece on sharing your pet's life with family, and the medication case is the sharpest example in it. Memofu's health log is built around this shape — reminders, doses marked as given, visible to everyone in the circle; you can see how it fits together on our features page.

What happens to the record at the end?

It is worth saying plainly, because nobody plans for it and everybody eventually needs it.

A pet's health record has a second life. For an animal with a long illness it becomes the thing that lets you and your vet make a decision with clear eyes rather than in a fog. Afterwards, for many people, it becomes something else entirely: not a medical file but the most complete account anyone has of how a particular animal lived — when the good months were, what they ate, how long they were comfortable.

Which is the practical reason to keep the record somewhere you can take it with you. A history you cannot export is a history that belongs to a company's product roadmap, and that is a bad place for it to be. We wrote about what happens when a service you trusted with photos changes its terms in where should your pet's photos live — the same reasoning applies with more force to a medical history, which cannot be re-created from anywhere.

How to start a record you will actually keep

Five rules, learned the hard way.

One place, not four. A note in your phone, a photo of a prescription, a paper folder and an app is the same as having nothing, because none of them is complete.
Start with weight and medication. They are the two highest-value fields and both take seconds. Everything else can be added when it comes up.
Write it in the room. Vet notes taken that evening are already 40% shorter and considerably less accurate.
Never record on a schedule you cannot keep on a bad week. A record that survives a stressful month is worth more than a thorough one that stops in March.
Export it once, early. Before there is much in it. If getting your data out is awkward at ten entries it will be impossible at a thousand, and that is exactly the moment it matters most.

Where Memofu fits

Memofu keeps the health log next to the photos, in one timeline that runs from the day your pet came home: weights and their trend, medications with reminders and a record of what was actually given, vet visits with your notes, and preventive-care dates. Because the circle is shared, everyone caring for the animal sees the same record — which is what solves the double-dose problem rather than papering over it.

Two commitments that matter more for a medical history than for anything else:

Full export is free, on every plan, forever — including after cancelling. A health record you cannot take to a new vet, or to a new app, is not really yours.
No ads, no sale of your data, no public feed. Your pet's medical history is not an advertising signal.

You can see the health log on our features page, and what is and is not paid on our pricing page.

Start with one number and today's date. In a year it will be a record; the first entry only has to be a line.

Again: this is a guide to keeping records, not veterinary advice. Anything that worries you about your pet is a question for your vet — and the record is what makes that conversation a good one.