This page is not veterinary advice, and it is deliberately not a schedule. It names no vaccine, gives no vaccination interval, names no parasite product and prints no plan for your dog. Those belong to a vet who has examined the animal and knows where you live.
What it does is quote what a veterinary reference actually states about examination frequency, and then say plainly how much that reference does not settle.
More often than most households do, and considerably more often than once a year for some dogs. The reference we read gives a floor rather than a target, and the difference between those two readings is the point of this page.
The sentence, quoted exactly
Merck’s chapter on preventative health care for small animals states: “Examinations by a veterinarian are generally recommended every few weeks for puppies and kittens until they are ~20 weeks old, then at least once a year for dogs and cats.” Read 4 August 2026.
It follows that with: “More frequent examinations may be recommended for older animals or those with chronic disease.”
Three things in those two sentences are worth separating out, because they usually get compressed into a vague impression of an annual check.
The first is the density of the early phase. Every few weeks until roughly twenty weeks of age is a lot of appointments in a short span, and it is a different regime from anything that follows. The second is the phrase at least once a year. At least is a floor. A great deal of household planning treats it as a ceiling. The third is that the floor moves. Older animals and animals with chronic disease are named as needing more, without a figure attached.
What the source states, and what it leaves open
Only the top two rows are quantified in the source. The bottom row is the largest gap on this page, and the one most people arrive wanting filled.
Why this page refuses to print a life stage schedule
A table of ages against intervals is what almost every page on this subject offers, and it is what we are declining to build. The reason is not squeamishness. It is that the reference we read does not contain one, and constructing it would mean inventing the numbers and then attributing them to nobody.
Consider what such a table would have to assume. It would need a definition of when a dog becomes senior, which varies enormously with size and is not given in what we read. It would need to fold in breed predispositions, which are real and are not in our source. It would need to know whether your dog has a chronic condition, which Merck names as a modifier without quantifying it. And it would have to be indifferent to where you live, which is not a reasonable assumption for anything involving parasites.
Every one of those variables is something your vet already knows and this page does not. So the honest output is the quoted floor, plus a list of the things that move it, plus an instruction to ask.
Stated openly rather than omitted quietly. We are not printing vaccination intervals, vaccine names, parasite product names, or any dosing. That is a fixed rule on this site and it applies here even though this is exactly the page where people expect to find them. The information exists, it is specific to your animal and your region, and your vet is the correct route to it.
What the visit is actually for
Merck describes the purpose as “health surveillance and wellness planning”, which it says includes “appropriate vaccination and parasite control, nutrition counseling, behavioral wellness assessment, and reproductive counseling”. Read 4 August 2026.
Two of those four are worth noticing, because they are the ones households do not think of as reasons to book.
Nutrition counselling is on the list as a routine component, not as something you raise when there is a problem. Merck separately emphasises monitoring body condition to maintain a healthy weight, noting that “overfeeding and oversupplementation may lead to numerous problems”. Read 4 August 2026. That is the reason we refuse to print feeding amounts anywhere on this site, and also a reason to bring the actual food bag to an appointment rather than describing it from memory.
Behavioural wellness assessment is the other one. Behaviour is usually raised only when it has become intolerable, by which point it has often been developing for months. It is on the list of things a routine visit covers, which makes the routine visit the cheap place to raise it. Our pages on litter box problems and indoor and outdoor living both end in the same place: behaviour changes have medical causes until proven otherwise.
The argument for surveillance rather than symptoms
The phrase Merck uses, health surveillance, is doing something specific. Surveillance is looking at an animal that seems well in order to find things that do not yet look like anything.
That framing matters because dogs and cats are poor at declaring problems and households are poor at noticing gradual ones. A dog that has slowed down over eight months has not slowed down on any particular day, so there is no day on which you think to ring. Our page on dental disease is the clearest example we have written: Merck puts some degree of periodontal disease in up to 80 percent of dogs by age two, which means most of it is present long before anything visible prompts a visit.
TWO WAYS OF DECIDING WHEN TO GO
SYMPTOM LED SURVEILLANCE LED
------------ ----------------
wait for something visible go at a stated interval
| |
gradual change is invisible gradual change is measured
| against the last visit
the day you notice is late |
| a baseline exists to compare to
the question is what now |
the question is what changed
Merck calls the purpose "health surveillance and wellness planning".
That is the right hand column, described in two words.
What we could not source
- Any life stage table. The main omission, discussed above.
- When a dog becomes senior. Not defined in what we read, and widely understood to vary with size and breed.
- Twice yearly examinations for older animals. Frequently recommended elsewhere. Merck says more frequent may be recommended, without a number. We are not supplying the number.
- What baseline bloodwork adds, and when. Not addressed in the section we read.
- Breed specific screening. Not addressed.
- Cats versus dogs. The quoted sentence covers both together. Cats are notoriously under presented for routine care and we found nothing that treats them separately.
- Cost, insurance and access. Deliberately out of scope. It is also, in practice, why many households delay, and it is a legitimate thing to raise with a practice directly.
A printable preparation and observation log
The first half is what to have ready. The second half is what to have watched, because surveillance between visits is what makes a visit worth something. Prints cleanly.
Questions people actually ask
My dog is healthy. Is an annual visit really necessary?
The reference says at least once a year for dogs and cats, without a healthy exemption. The framing it uses is surveillance, which is by definition something you do to animals that seem well. Whether that is necessary for your dog is a judgement, and one your vet is better placed to make than we are.
How old is old?
We could not source a definition and we are not going to guess. It is widely accepted to vary with body size, and a large breed dog is generally considered to reach it earlier than a small one, but that is not in the document we read and we will not attribute it to it. Ask.
Why will you not just give me the vaccination schedule?
Because it is a fixed rule on this site, and because a schedule that is right in one region and one animal is wrong in another. Naming intervals and products here would look helpful and would be the least defensible thing on the page. Your practice will give you a plan for your dog in a two minute conversation.
What if I cannot afford annual visits?
An honest question most pages ignore. We have nothing sourced to offer and will not pretend otherwise. What we would say is that practices deal with this constantly and are usually willing to discuss priorities, and that a conversation about what matters most for your animal is more useful than silently skipping a year.
Should cats go as often as dogs?
The quoted sentence treats them together, saying at least once a year for dogs and cats. We found nothing that separates them, which is itself worth knowing, since cats are widely reported to be seen less often than dogs.
Related pages
Related material here: dog dental care, nail trimming, litter box problems, indoor and outdoor cats and guinea pigs and vitamin C. Food indexes: can dogs eat, can cats eat, can my pet eat. Out of hours: find an emergency vet.
How we sourced this page
One document, fetched and read on 4 August 2026. Everything quantified above comes from it. Everything not quantified is marked as a gap rather than filled in.
- Merck Veterinary Manual, Preventative Health Care for Small Animals. Used for the examination frequency statement covering puppies, kittens and adults, the note about older animals and chronic disease, the description of the purpose as health surveillance and wellness planning and its four listed components, and the emphasis on body condition with the warning about overfeeding and oversupplementation.
The one line to take away. At least once a year is a minimum stated for healthy adults, not a recommendation for every dog, and the reference names two categories that need more without saying how much more. That gap is your vet’s to fill.
