Last year, a friend of mine paid £4,200 for cruciate ligament surgery on her Labrador’s right knee. The insurance paid out without fuss. Eight months later, when the left knee went — which happens in about 60% of dogs after the first rupture — her insurer declined the claim. Same knee structure, same surgery, same dog. But the policy had a bilateral exclusion clause she’d never heard of, and that second knee was now considered a pre-existing condition.
She’s not alone. The Financial Ombudsman Service handled 2,286 pet insurance complaints in 2026/25, up from 1,655 the year before. Pre-existing condition disputes make up the single largest chunk of those complaints. And the FOS upheld 42% of them in the consumer’s favour — the highest uphold rate of any insurance line. That tells you two things: insurers reject claims they shouldn’t, and plenty of owners don’t realise they have grounds to fight back.
This guide covers everything I wish someone had told me before I bought my first lifetime policy: how insurers actually define pre-existing conditions (it’s broader than you’d think), which exclusion types you’ll encounter, the handful of providers who might cover existing issues, and what to do when your claim gets refused.
How UK Pet Insurers Define a ‘Pre-Existing Condition’
The legal definition looks simple enough: any illness, injury, or symptom your pet had before the policy start date or during the initial waiting period. But the devil’s in “symptom.” Insurers don’t just mean diagnosed conditions — they mean anything a vet wrote down that could be interpreted as an early sign.
The Symptoms-vs-Diagnosis Trap (Why Vet Notes Matter)
Here’s what catches people out. Your dog doesn’t need a formal diagnosis for a condition to be pre-existing. If a vet noted “slight stiffness in left hind leg” during a vaccination appointment two years ago, and your dog later needs hip surgery, that note can be cited as evidence the condition existed before your cover started.
Underwriters read your pet’s clinical history line by line when you submit a claim. Every consultation note, every prescription, every passing observation — they go back to puppyhood. A forum poster on PetForums shared a story that’s stuck with me: she mentioned to her vet that her dog was “a bit stiff but just getting old.” Nothing was diagnosed or treated. Years later, when she claimed for arthritis, the insurer pulled that note and declined the claim.
The takeaway? Be careful what you say at vet appointments. I’m not suggesting you hide genuine health concerns — that helps no one, least of all your dog. But casual comments like “he’s been off his food this week” or “she seems a bit tired lately” get recorded. If those vague symptoms later connect to something claimable, you’ve handed the insurer an exclusion on a plate.
The Free-Vet-Check Mistake That Excludes Conditions
Many insurers and pet shops offer a “free first vet check” when you get a new puppy or kitten. It sounds helpful. It can actually backfire spectacularly.
The timing matters. If you arrange insurance before that check, any clinical signs the vet notes during the examination will be recorded after your policy start date. But if you take the free check first, everything the vet writes becomes part of your pet’s pre-policy history. A heart murmur. Slightly loose hips. Early signs of patella luxation. All of it becomes pre-existing the moment you then buy a policy.
My advice: get insurance in place the day you bring a new pet home, before that first vet visit. Yes, there’s typically a 14-day waiting period for illness claims anyway. But at least conditions discovered during your first appointment won’t be automatically excluded for life.
How Insurers Backdate Exclusions Using Clinical History
This is where things get properly frustrating. You take out a policy. Your dog is healthy. Two years later, something goes wrong, you submit a claim, and the insurer requests your vet’s full clinical history. Then they find a note from before your policy started — perhaps before you even owned the dog — and use it to decline.
This isn’t hypothetical. One FOS case study describes a consumer who didn’t disclose a pre-existing medical condition. The insurer requested vet records when a claim was submitted, found evidence of prior symptoms, and declined. The consumer complained to the FOS, arguing they didn’t know about the condition. Sometimes the FOS sides with the consumer in these situations; sometimes they don’t. It depends on whether the consumer “ought reasonably to have known” about the condition.
For rescue dog adopters, this creates a real problem. The shelter might not provide complete vet history. The previous owner might not have been forthcoming. You genuinely don’t know what’s in those records. When you claim, neither do you — until the insurer digs it up.
The Three Types of Exclusion You’ll See
Not all exclusions work the same way. Understanding the difference saves you from nasty surprises.
Permanent Lifetime Exclusion (Most Common)
If your pet has ever been treated for or shown signs of a condition, most UK insurers will exclude that condition permanently. It doesn’t matter if it was five years ago. It doesn’t matter if it fully resolved. It’s out.
This is the standard approach from providers like Tesco, most of the comparison site brands, and the budget end of the market. Simple, harsh, and very common. If your dog had a skin allergy as a puppy, any future skin issues — regardless of cause — may be excluded under the same umbrella. Insurers tend to interpret “related conditions” broadly.
Time-Limited Exclusion (Resolved Conditions)
A few insurers take a softer line on conditions that genuinely resolved. Petplan, for example, says they’ll place a temporary exclusion on something like kennel cough. Once your vet confirms the dog has been symptom-free for three months, they’ll remove the exclusion and cover future occurrences.
This sounds reasonable, and it is — for acute, temporary conditions. But it doesn’t apply to chronic issues. Arthritis, diabetes, epilepsy, heart conditions — anything likely to affect your pet long-term stays excluded forever at Petplan too.
Bilateral Exclusion: One Knee, One Eye, One Ear, Then Both
This is the one that caught my friend out, and it’s more common than people realise.
Bilateral conditions are those affecting paired body parts: eyes, ears, hips, knees, elbows. If your dog ruptures one cruciate ligament, many insurers automatically exclude the other knee from that moment forward. The logic is that weaknesses in one side suggest the same weakness on the other side — and statistically, that’s often true. But it feels deeply unfair when you’ve paid premiums for years and the second injury happens much later.
The majority of UK insurers treat bilateral conditions as a single condition, meaning your vet fee limit doesn’t double if both sides need treatment in the same year. If your annual limit is £4,000 and each knee costs £3,000 to repair, you’re only getting £4,000 paid out — not £6,000.
Two providers handle this differently. ManyPets and Asda Money consider bilateral conditions as separate conditions when they’re diagnosed at different times. That’s a significant distinction if you’re shopping for cover and own a breed prone to cruciate or hip problems.
Insurers That Offer Pre-Existing Cover (and the Catch)
The mainstream UK market excludes pre-existing conditions outright. But a small number of providers will consider covering them, usually with strict conditions attached.
Bought By Many / Many Pets: 24-Month Symptom-Free Rule
ManyPets (formerly Bought By Many) offers the most well-known pathway to covering pre-existing conditions in the UK. If a condition has been symptom-free and treatment-free for two years before your policy start date, it can be covered.
They also offer a specific “Pre-existing” policy tier for conditions that haven’t hit that two-year mark. If your pet has been symptom-free and treatment-free for at least three months, you may be eligible — but the cover limits are lower (up to £1,500 for pre-existing condition claims) and the policy costs more.
The catch? “Symptom-free and treatment-free” is strictly interpreted. Any vet visit where the condition was mentioned, any medication, any advice given — the clock resets. And you’ll need documentation from your vet proving the symptom-free period.
Waggel and Animal Friends: Case-by-Case Underwriting
Waggel uses moratorium underwriting, meaning they don’t ask detailed health questions upfront. Instead, they review your pet’s history when you make a claim. If a condition hasn’t been claimed for within a certain period (typically two years), it may then be included in cover going forward.
This approach has pros and cons. The pro: faster sign-up, no lengthy health questionnaires. The con: you won’t find out whether something is covered until you actually try to claim. That uncertainty bothers some people.
Animal Friends is the UK’s second-largest pet insurance brand and offers everything from accident-only to lifetime cover. They assess pre-existing conditions on a case-by-case basis during underwriting. Whether they’ll cover a condition depends on its nature, how long ago it occurred, and whether it fully resolved. There’s no published rule; you need to apply and see what they offer.
Petplan and Tesco: Standard Permanent-Exclusion Policies
Petplan reviews pre-existing conditions individually and will sometimes remove temporary exclusions once your pet has been symptom-free for a few months. But chronic or lifelong conditions stay excluded. They’re upfront about this: they don’t believe a “one size fits all” pre-existing policy is possible.
Tesco is more straightforward: pre-existing conditions aren’t covered, full stop. No exceptions, no time-limited exclusions, no pathway back. If your dog had it before the policy started, it’s out.
What ‘Resolved After 24 Months’ Actually Has to Look Like
This trips people up. “Two years symptom-free” doesn’t just mean your dog hasn’t been to the vet for that condition. It means:
- No clinical signs recorded in vet notes
- No medication prescribed, not even as a precaution
- No dietary changes related to the condition
- No follow-up appointments to monitor it
Ask your vet to check the records. If they wrote “owner reports no recurrence” during a routine check-up, that’s fine. But if they noted “condition stable” or “no flare-ups currently,” that implies the condition still exists — it’s just dormant. Insurers will argue that’s not the same as resolved.
Switching Provider with a Pre-Existing Condition
Why Most Owners Are Trapped on Their First Lifetime Policy
Here’s the uncomfortable reality: once your dog develops a chronic condition on a lifetime policy, switching providers effectively means losing cover for that condition forever.
Lifetime policies keep a covered condition in the benefit pool year after year, as long as you renew without a gap. That’s their whole selling point. But the moment you switch, everything your pet has ever been treated for becomes pre-existing under the new policy. Your old cover for hip dysplasia, skin allergies, or recurring ear infections? Gone.
This is why I tell every new dog owner the same thing: choose your first lifetime policy as if you’ll never be able to leave. Because, realistically, you won’t.
When Switching Still Makes Sense (Healthy Dog, Premium Hikes)
There are situations where switching is worth it.
If your dog is genuinely healthy — no chronic conditions, no ongoing treatments — and your current insurer has hiked premiums aggressively, shopping around makes sense. Some insurers (ManyPets, Sainsbury’s) waive the standard 14-day waiting period if you’ve been with your previous provider for 12 months or more and there’s no gap in cover. That removes one barrier.
Just be realistic. Any condition your dog has ever had becomes pre-existing on the new policy. If your dog had a bout of gastroenteritis three years ago that fully resolved, a new insurer might still exclude gastrointestinal conditions. Check their exact wording before you commit.
The 14-Day Cooling-Off Trick That Doesn’t Actually Work
I’ve seen this suggested online: take out a new policy during the 14-day cooling-off period while keeping your existing cover active, then cancel the old policy only if you’re happy with the new one.
Technically, you can do this. It doesn’t create continuous cover for pre-existing conditions, though. Your new insurer still treats everything that happened before their policy started as pre-existing. Having the old policy still active doesn’t change that.
The only thing the cooling-off period helps with is checking the new insurer’s terms and exclusions before you’re locked in. That’s useful. But don’t expect it to magically transfer pre-existing cover across.
Adopting a Dog With a Known Condition
Rescue Dogs: What Vet History Will the Insurer Demand
When you adopt from a rescue centre, you’ll typically get some handover notes about the dog’s health. Maybe a vaccination record, a note about any conditions discovered during their stay, and possibly a brief summary from the previous owner.
That’s often incomplete.
When you eventually claim, your insurer will request the dog’s full clinical history — not just what the rescue told you. They’ll contact every vet practice the dog has ever attended. Records you didn’t know existed come to light. Conditions the rescue didn’t mention (or didn’t know about) suddenly become your problem.
My advice: ask the rescue for every piece of paperwork they have. Ask them to contact previous vets for records if possible. The more you know upfront, the fewer surprises later.
Realistic Cover Options for a Dog With Existing Issues
You can still insure a rescue dog with known health problems. You just can’t expect those problems to be covered.
Most insurers will offer a policy with a specific exclusion for whatever condition the dog has. Everything else remains covered. So a dog with a heart murmur can still get cover for accidents, infections, broken bones — just not cardiac issues.
If the condition has been symptom-free for two years, ManyPets might cover it. Otherwise, your realistic options are:
- Take standard cover and accept the exclusion
- Self-insure for the known condition (put aside a separate savings pot)
- Consider whether the dog’s likely ongoing vet costs are manageable without insurance for that specific issue
Many rescue dogs live long, healthy lives with conditions that sound scary on paper. Insuring the rest of their health is still worthwhile.
How to Document Your Dog to Avoid Future Disputes
Routine Vet Visit Wording That Triggers Exclusions
This is awkward to say, but it matters. The way you describe symptoms to your vet can come back to haunt you.
Vets write down what you tell them. If you say “she’s been limping a bit lately,” that goes in the notes — even if the vet examines her and finds nothing wrong. Two years later, when you claim for hip dysplasia, the insurer pulls that limping note and argues she was already showing signs before the policy.
I’m not suggesting you withhold information from your vet. But be precise. If your dog was limping because she stepped on a thorn, say that. If she’s stiff after a long walk but fine the next day, distinguish that from ongoing stiffness. Give your vet context they can record accurately.
And never mention symptoms you’re not actually concerned about just to fill the silence. That throwaway “well, he’s getting a bit grey around the muzzle” doesn’t need to be on record.
Why You Should Request and Read Your Clinical History Annually
You have the right to request your pet’s full clinical records. Do it every year.
When you read them, you might spot things you’d forgotten about, or things you didn’t realise were recorded. If something’s inaccurate — a symptom recorded that didn’t happen, or a condition described differently than you understood it — you can ask the vet to correct or annotate the record while it’s still fresh.
This also helps you understand what a future insurer will see if you ever need to switch. No surprises.
When the Insurer Refuses a Claim
The Financial Ombudsman Service Process
First, you need to go through your insurer’s internal complaints process. They have eight weeks to give you a final decision. If they decline, or if they don’t respond in time, you can escalate to the Financial Ombudsman Service (FOS) — it’s free.
The FOS is independent. They review your case, request documents from both sides, and decide whether the insurer acted fairly. For pet insurance, they look closely at whether the insurer’s definition of pre-existing was applied reasonably, whether exclusions were clearly communicated, and whether the clinical evidence actually supports the decline.
Realistic Outcomes and Average Resolution Times
The FOS upheld 42% of pet insurance complaints in 2026/25 in the consumer’s favour. That’s encouraging — but it also means 58% didn’t succeed.
If the FOS sides with you, they can order the insurer to pay out the claim. They can also award compensation for distress and inconvenience, though in pet insurance cases that’s typically modest — around £100 in most examples I’ve seen.
Timelines vary. The FOS doesn’t publish specific averages for pet insurance, but the overall target is a few months for straightforward cases. Complex disputes take longer. One thing working in your favour: pet insurance is a priority area for them given the complaint volumes, so cases do move.
Gather your evidence before you submit: the full vet history, your original application, the policy wording, any correspondence with the insurer, and ideally a written statement from your vet explaining the condition’s timeline. The stronger your documentation, the faster the resolution.
FAQ
Can I cover a pre-existing condition if I’m willing to pay more?
Sometimes. ManyPets offers a pre-existing tier with lower limits and higher premiums. Most other insurers will just exclude the condition entirely — paying more doesn’t help.
Will my premium go up if I disclose a pre-existing condition when applying?
Possibly, but not always. Some insurers simply exclude the condition and charge the same rate. Others adjust the premium based on the dog’s overall risk profile. The one thing you shouldn’t do is fail to disclose. If the insurer finds out later, they can void your entire policy — not just exclude the condition.
My dog had an issue years ago that fully healed. Do I have to mention it?
Yes, if the application asks about previous conditions or treatments. “Fully healed” doesn’t mean it never happened. Disclose it and let the insurer decide. Often, genuinely resolved acute conditions (a cut paw, a stomach bug) don’t result in exclusions — but that’s the insurer’s call, not yours.
Is the Financial Ombudsman worth bothering with?
If you genuinely believe your claim was wrongly declined, yes. Forty-two percent of pet insurance complaints were upheld in favour of the consumer in 2026/25. That’s not a long shot. And it’s free.
How do I find out what’s in my dog’s vet records?
Call or email your vet practice and request a copy of your pet’s full clinical history. They’re legally required to provide it. Some practices charge a small admin fee. Do this regularly — annually is ideal.
A final thought: pet insurance is still worth having, even with all these exclusions and gotchas. A single complex surgery can cost £5,000–10,000, and most dogs will need significant vet care at some point. But go in with your eyes open. Read the policy wording, not just the comparison site summary. Ask your insurer directly what they’ll exclude. And get cover in place before that first vet check — not after.
Featured Image Source: Pexels
