There’s a very particular kind of panic that happens when your dog’s vaccination reminder lands.
One minute, you’re making a brew. The next, you’re reading five conflicting opinions online, wondering whether your dog really needs another booster, whether asking your vet questions makes you a difficult owner, and why everyone on Facebook seems to be arguing about it.
Perhaps your dog’s vaccination was delayed during the COVID-19 pandemic without any obvious consequences. Maybe your dog has allergies, takes Apoquel or regularly needs an antihistamine such as Piriton. Or perhaps they’ve reacted badly to a vaccination before and you’re worried about repeating the experience.
None of that means you’re trying to neglect your dog’s care.
Most owners asking these questions are simply trying to make an informed decision rather than automatically following a reminder without understanding what their individual dog needs.
That’s where titre testing for dogs can be useful.
What is titre testing for dogs?
A canine titre test is a blood test that looks for measurable antibodies against certain infectious diseases.
Antibodies are proteins produced as part of the immune response after vaccination or exposure to a disease. You can think of them as part of the immune system’s recognition and defence team. They help the body identify something it has encountered before and respond more effectively.
A dog vaccination titre test can therefore help answer a more specific question:
Does my dog still have detectable antibodies from their previous core vaccinations, or should we discuss revaccination?
Titre testing is not about being “anti-vaccine”.
Vaccines protect dogs from serious and potentially fatal diseases. Titre testing is simply one tool that may help owners and vets make more individual decisions about when some core vaccinations need to be repeated.
What diseases does a dog titre test check?
The canine titre tests most commonly discussed in relation to routine core vaccination check antibodies associated with:
- Canine distemper virus
- Canine parvovirus
- Canine adenovirus, associated with infectious canine hepatitis
These are often referred to collectively as the DHP core vaccine diseases.
They are serious illnesses, which is precisely why vaccination and immunity matter. The purpose of titre testing isn’t to dismiss the risks. It’s to establish whether there is evidence that an adult dog may already have immunity before automatically administering another DHP booster.
The World Small Animal Veterinary Association states that adult vaccination decisions for distemper, adenovirus and parvovirus can be informed by serological testing. It also advises that core vaccines shouldn’t be administered more frequently than necessary because modern modified-live core vaccines can provide immunity lasting for many years. Read the WSAVA vaccination guidelines.
Does every dog need vaccinations every year?
Not every vaccination follows the same schedule.
The phrase “annual vaccination” can be misleading because your dog may attend an annual health check without receiving exactly the same vaccines every year.
After an appropriate puppy course and subsequent vaccination, the DHP core components are commonly repeated at intervals of three years or longer, depending on the vaccine used, your dog’s history and veterinary guidance. Some other vaccines may need to be given more frequently because their duration of immunity is shorter.
This means the real question is rarely:
“Should my dog have annual vaccinations, yes or no?”
A more useful set of questions would be:
- Which diseases is my dog due to be vaccinated against?
- Is this a core or lifestyle-related vaccine?
- When was each component last administered?
- What does the manufacturer recommend for that particular vaccine?
- Could titre testing help with the DHP part of the decision?
- What are my dog’s current health, lifestyle and exposure risks?
Your dog’s yearly veterinary health assessment remains important even when a vaccine isn’t needed at that appointment. A vaccination reminder and a health check are not necessarily the same thing.
What does a positive titre test result mean?
A positive titre result means that antibodies to the disease being checked have been detected.
In an adult dog previously vaccinated against distemper, parvovirus and adenovirus, detectable antibodies provide evidence that the immune system has responded and are generally considered reassuring when making decisions about core revaccination.
In simple terms, a positive result may support the decision that another DHP booster isn’t currently necessary.
However, titre tests measure antibodies. They do not provide a complete map of every part of the immune system, and results should always be interpreted alongside your dog’s history and individual circumstances.
What does a negative titre test result mean?
A negative result means that the test didn’t detect antibodies at the threshold being measured.
That doesn’t always prove that your dog has absolutely no immune memory or protection. The immune system also includes cell-mediated responses and memory cells, which a standard antibody titre test doesn’t directly measure.
Nevertheless, a negative result is important and should prompt a conversation with your vet about your dog’s history, the reliability of the test used and whether revaccination is appropriate.
It shouldn’t be interpreted in isolation or through a Facebook comment section.
Does titre testing include Leptospirosis?
This is one of the most common areas of confusion.
The standard DHP titre test doesn’t assess protection against Leptospirosis in the same useful way that it assesses antibodies associated with distemper, parvovirus and adenovirus.
Leptospirosis is a separate vaccination conversation. The immune response, duration of protection and interpretation of antibody levels differ from those of the viral DHP diseases.
A decision about Leptospirosis vaccination should consider factors including:
- Whether Leptospirosis occurs locally
- Your dog’s access to standing water, waterways or muddy areas
- Potential contact with rats, wildlife or contaminated urine
- Travel and geographical exposure
- Your dog’s health and vaccination history
- The vaccine product available through your vet
This is why titre testing shouldn’t be presented as a blanket replacement for every vaccination. It can inform one part of the picture, but it cannot answer every vaccine-related question.
Does titre testing cover kennel cough or rabies?
A routine DHP titre test doesn’t usually cover kennel cough vaccination.
Kennel cough is a broad term for infectious respiratory disease involving different possible organisms. Decisions about vaccination are normally based on lifestyle and exposure, such as boarding kennels, daycare, shows, training classes or frequent contact with groups of dogs.
Titre testing also doesn’t replace the legal requirements associated with rabies vaccination for international travel. A rabies antibody test may be required in certain travel situations, but that is different from using a routine DHP titre test to decide whether to revaccinate.
Check current travel requirements well in advance if you intend to take your dog abroad.
Can puppies have titre testing?
Yes, puppies can sometimes have titre testing, but the timing and interpretation are more complicated.
Puppies receive maternally derived antibodies from their mother, primarily through colostrum shortly after birth. These antibodies offer valuable early protection, but they can also interfere with a puppy’s response to vaccination.
The amount and duration of maternal antibody protection vary between puppies, even within the same litter. That’s one of the reasons puppy vaccines are given as a series rather than relying on one injection at a random age.
Titre testing may be used after the puppy vaccination course to help determine whether the puppy has produced an antibody response to distemper, parvovirus and adenovirus.
The current WSAVA guidance discusses serological testing from approximately 20 weeks of age. Where protective antibodies are demonstrated, this may help confirm that the puppy has responded to vaccination. View the full WSAVA guidance.
Testing too early, or without understanding when the vaccinations were given, may produce information that is difficult to interpret. Puppy titre testing should therefore be planned with a vet rather than treated as a stand-alone home decision.
When might titre testing be particularly useful?
Titre testing may be worth discussing when:
- An adult dog is approaching a scheduled DHP booster
- The dog has an incomplete or uncertain vaccination history
- An owner wants more information before agreeing to revaccination
- The dog has previously experienced a suspected vaccination reaction
- A puppy’s response to its initial vaccination course needs checking
- A dog has a chronic medical condition
- The dog is receiving medication that affects or modulates immune function
- There are concerns about whether a medically complex dog should be vaccinated at that particular time
It doesn’t mean that every dog in these categories should automatically be titre tested or that vaccination is unsuitable. It means there may be a stronger reason to have an individual risk-benefit conversation.
What about dogs with allergies?
Allergies are caused by an inappropriate or exaggerated immune response to substances that would normally be harmless, such as environmental allergens, fleas or certain food proteins.
Describing the immune system as simply “weak” or “overstressed” doesn’t fully explain what is happening. However, a dog with persistent allergy symptoms is already dealing with an ongoing inflammatory condition, and that deserves consideration as part of their wider health picture.
Signs that may indicate active or poorly controlled allergic disease include:
- Recurrent itching or chewing
- Red or inflamed skin
- Frequent ear infections
- Repeated paw licking
- Hair loss
- Recurrent skin infections
- Regular digestive symptoms
- Persistent reliance on medication to remain comfortable
Having allergies doesn’t automatically mean that a dog mustn’t be vaccinated.
It does mean I would want the owner and vet to consider how stable the dog currently is, what medication they’re receiving, which vaccine components are actually due, their exposure risk and whether titre testing could provide useful information about existing DHP antibodies.
Can a dog taking Apoquel be vaccinated?
Apoquel contains oclacitinib and is prescribed to manage itching associated with allergic dermatitis and the clinical signs of atopic dermatitis.
It can be extremely valuable for improving a dog’s comfort and quality of life. However, controlling the itch doesn’t necessarily identify or remove the original trigger behind the allergic disease.
The official product information advises that underlying causes, such as flea allergy, contact dermatitis or food hypersensitivity, should still be investigated. It also recommends addressing complicating bacterial, fungal or parasitic problems.
Apoquel modulates parts of the immune system, so vaccination decisions should be discussed with the prescribing vet rather than based on a blanket internet rule. The product information reports an adequate antibody response to distemper and parvovirus vaccination in one puppy study, alongside a reduced serological response to parainfluenza and rabies in treated puppies. It states that the clinical relevance at the recommended dosing regimen remains unclear. Read the official Apoquel product information.
Therefore:
- Apoquel isn’t an automatic reason to refuse every vaccination.
- It isn’t proof that a dog has no immunity.
- It does give you a reason to discuss the dog’s health, medication, vaccine history and timing properly.
- A titre test may help inform the DHP part of that conversation, depending on the individual dog.
Never stop or alter Apoquel purely to prepare for a vaccination without speaking to the prescribing vet.
What if my dog regularly takes Piriton or another antihistamine?
Some dogs receive an antihistamine such as chlorphenamine, commonly known by the brand name Piriton, to help manage allergic symptoms.
Regular antihistamine use doesn’t automatically make vaccination unsafe and doesn’t prove that the immune system is suppressed.
However, repeated reliance on an antihistamine suggests that there may be an ongoing trigger or condition requiring management. It’s therefore sensible to look beyond the reminder card and consider:
- Why does the dog need the antihistamine?
- Are their symptoms currently stable?
- Has the underlying cause been investigated?
- Are there recurring skin, ear or digestive problems?
- Which vaccine components are due?
- Would a DHP titre test provide useful information?
Piriton can also be unsuitable for some dogs or interact with other medication. It should only be given under veterinary guidance, using a product and dose confirmed as appropriate for that individual dog.
Should an unwell dog be vaccinated?
Vaccination is generally planned when a dog is clinically well enough to respond appropriately.
If your dog is experiencing an active illness, significant allergy flare, infection, fever or major change in health, speak to your vet before proceeding. The decision may be to vaccinate, postpone, separate different vaccine components or investigate further.
The presence of a chronic condition doesn’t automatically prevent vaccination. What matters is the nature and stability of the condition, the treatment being used and the dog’s risk of infectious disease.
Dogs receiving potent immunosuppressive treatment require particularly careful veterinary planning. Titre testing for the DHP diseases may sometimes help establish whether existing antibodies remain detectable while vaccination is postponed or reconsidered. Read the WSAVA guidance on vaccination and immunosuppression.
What about breeding dogs and pregnant bitches?
Vaccination planning should ideally happen before mating rather than becoming an unexpected decision during pregnancy.
A breeding bitch still needs appropriate protection against infectious disease, both for her own health and because the antibodies passed through her colostrum contribute to her puppies’ early protection.
However, pregnancy isn’t the ideal time to discover that her vaccination history is unclear or that she may be overdue.
Before mating, review:
- Her full vaccination history
- The specific vaccine components previously given
- Her current health and allergy status
- Any previous vaccination reactions
- Whether DHP titre testing may be useful
- Her likely exposure during pregnancy
- The vaccination status of other dogs in the household
- Any veterinary recommendation based on local disease risk
The vaccine product and timing matter, as not every vaccine is authorised for use during pregnancy. Never arrange vaccination during pregnancy without veterinary advice.
Are there any disadvantages to titre testing?
Titre testing is useful, but it has limitations.
It may involve:
- The cost of the blood test
- A veterinary consultation or blood-draw fee
- Differences between in-clinic testing and laboratory methods
- Results that still require professional interpretation
- A separate decision about Leptospirosis and other lifestyle vaccines
- Kennels, daycare providers or organisations that may not accept titre results instead of their usual vaccination requirements
A titre result should help improve the conversation. It isn’t intended to replace your vet, your dog’s medical history or common sense.
Will boarding kennels accept a titre test?
Some boarding kennels, daycare providers, training facilities and dog-related organisations accept evidence of positive DHP titre results. Others have fixed vaccination policies and may not accept them.
Always check the exact policy before booking.
Ask which diseases must be covered, whether a laboratory report is required, how recent the test must be and whether Leptospirosis or kennel cough vaccination is also expected.
Don’t assume that a positive titre test will automatically meet every organisation’s admission requirements.
Do I need a titre test before every booster?
Not necessarily.
Some owners choose titre testing when a DHP booster becomes due. Others follow the recommended revaccination interval after discussing their dog’s history and risk with their vet.
There isn’t one perfect approach for every dog.
The value of testing depends on why you’re doing it, what decision the result will inform and whether the result will meaningfully change the plan.
How do I decide what is right for my dog?
Start by gathering:
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Your dog’s vaccination record and the names and dates of the vaccines given
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Any previous titre results or details of earlier reactions
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Current medication, allergy history and existing health conditions
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Travel plans, boarding requirements and likely exposure through their normal lifestyle
Then separate the discussion into individual components.
Rather than asking whether your dog needs “their vaccinations”, establish whether you are discussing DHP, Leptospirosis, kennel cough, rabies or something else. They don’t all behave in the same way and shouldn’t automatically be treated as one decision.
Need help understanding your dog’s vaccination options?
A vaccination decision shouldn’t be made from a reminder card, a frightening Facebook post or a blanket rule that treats every dog in exactly the same way.
During a one-to-one Coaching Call, I can help you:
- Make sense of your dog’s vaccination history
- Understand what a titre test can and cannot tell you
- Review their allergy, diet, medication and wider wellness history
- Identify the questions to take back to your vet
- Separate the DHP discussion from Leptospirosis and lifestyle vaccines
- Create a clearer, more organised next-step plan
My role isn’t to prescribe vaccines or replace your vet. It’s to help you understand the wider picture, prepare for an informed veterinary conversation and feel more confident about the questions you’re asking.
Book a one-to-one Coaching Call with IsobelWhat this means for your dog
Titre testing for dogs isn’t anti-vaccination, and it isn’t a universal replacement for every booster.
It is a useful blood test that can identify detectable antibodies associated with canine distemper, parvovirus and adenovirus. For some dogs, that information may help owners and vets decide whether another DHP vaccination is currently necessary.
Your dog’s age, vaccination history, health, medication, allergies, previous reactions, lifestyle and exposure risk should all form part of the decision.
Clear information. Calm conversations. Individual decisions.