This is the condition the fine print is written for. Spot states outright that ligament and knee conditions are bilateral and related regardless of cause, so an occurrence on one side affects both. Lemonade puts ruptured cranial cruciate ligaments inside its definition of orthopedic conditions, which carries a 30 day wait rather than the 14 day illness one. A dog that goes lame in week three sits on the wrong side of that line at two of the three insurers here.
What is torn knee ligament (the dog version of an ACL tear), in plain terms?
The cranial cruciate ligament holds the knee together front to back. In dogs it usually does not snap in one dramatic moment; it frays over months until a normal jump finishes it. The dog goes suddenly and severely lame on a hind leg, often after nothing unusual. Surgery is the normal treatment and rehabilitation runs for months. Because the failure is degenerative rather than traumatic, the other knee is frequently already weakening while the first one is being repaired.
At what age does it usually appear?
Middle age for most dogs, commonly between four and seven, though overweight and large-breed dogs go earlier. The first sign is often not the rupture itself but a subtle intermittent hind-limb lameness weeks or months before, which resolves and returns. That earlier episode is the one that matters: if it was examined and noted before cover began, the eventual rupture can be treated as the continuation of a known condition rather than a new event.
Which clause should you check before you buy?
Look for the phrase regardless of cause. Spot uses it to tie both knees together even when the first rupture was a clean accident, which is the widest version of this clause we have read. Then check whether cruciate sits inside the orthopedic definition, because that is what decides whether you wait 14 days or 30. Finally, check how the policy treats a prior lameness episode that resolved: if any recorded hind-limb lameness counts as related, the mild limp your dog had eighteen months ago may already have closed the claim you are about to make.
Do insurers treat both sides of the body as one condition?
Named as a bilateral condition in Trupanion policy form TRU-00001 (08/11), Definitions 7.c and Exclusions 5.c(2), which cites anterior cruciate ligament weakness by name; read 2026-09-01
Cranial cruciate ligament rupture: how long before an insurer will pay for it?
Also called torn knee ligament (the dog version of an ACL tear). Each insurer's waiting period and second-side rule below, from its own policy document.
Which insurer covers torn knee ligament (the dog version of an ACL tear) soonest, and which makes you wait?
Cranial cruciate ligament rupture falls under the cruciate-ligament class at most US insurers. The table below gives each insurer's waiting period and its rule for the second side of the body, taken from the insurer's own policy document.
| Insurer | Waiting period | Second side of the body | Hereditary and congenital | Where it says so |
|---|---|---|---|---|
| Spot | 14 days No longer orthopedic waiting period: ligament and knee conditions share the standard 14 days. But the policy defines them as bilateral and related regardless of cause, so an occurrence on one side affects both sides. | Second side counts as pre-existing | Covered | Definitions, Ligament and Knee Conditions, page 2; Exclusion o |
| Lemonade | 30 days Ruptured cranial cruciate ligaments are named in the definition of orthopedic conditions, so the 30 day orthopedic waiting period applies rather than the 14 day illness one. The second-side rule comes from the separate definition of a Bilateral Condition, which tests whether the condition is chronic and affects both sides. | Second side counts as pre-existing | Covered | Definitions, Orthopedic Conditions, page 14, which names ruptured cranial cruciate ligaments; Definitions, Bilateral Condition, page 14: "a chronic condition that affects both sides of your pet's body, even if clinical signs or symptoms do not present at the same time"; Pre-existing conditions, which excludes bilateral conditions whose signs were present before the start date or before the end of a waiting period; Waiting periods |
| Trupanion | 30 days No separate cruciate waiting period is stated in this specimen; it falls under the general 30 day illness waiting period. | Second side counts as pre-existing | Not stated in the document | Waiting period at 5.b(2), page 3 of 9; bilateral exclusion at 5.c(2), page 3 of 9, which names anterior cruciate ligament (ACL) weakness explicitly; definition at 7.c, page 6 of 9, which names cruciate issues |
| Figo | 180 days Six months, and the wording that follows is the strictest combination in this register. The knee clause is identical to the one in the other Independence American policy here, calling ligament, patella, meniscus and knee soft tissue bilateral and related regardless of cause. On top of that, this document states that ligament and knee conditions are never considered cured, so unlike an ordinary condition they cannot come back into cover after a symptom-free year. | Second side counts as pre-existing | Covered | Definitions 22, Ligament and Knee Conditions, page 2 of 13: conditions involving a ligament, patella, meniscus or soft tissue disorder of the knee, considered bilateral and related regardless of cause; Definitions 44, Waiting Period, page 3 of 13; Pre-Existing Conditions, page 5 of 13, which states that ligament and knee conditions are not considered curable |
The waiting period for torn knee ligament (the dog version of an ACL tear) is the number that decides whether a claim in the first year is paid at all, and it is the figure insurers vary most quietly. Each row below states the section of the policy it came from.
Every row cites the policy form code and the section it was read from, with the date we read it. Oldest check date on this page: .