Entropion in Dogs and Cats: When Eyelids Turn Inward — And Why Surgery Matters

Entropion is a condition where the eyelid rolls inward, and one that tends to get worse, not better, on its own. If your dog or cat has been squinting, tearing up, or rubbing at one eye for days and it just won't let up, it's worth a closer look before writing it off as dust or a passing irritation. Sometimes what looks like a minor eye issue may just actually be entropion.

Author: Emi Kooyman, DVM | Founder, Spay Neuter Vets

Published date: September 30, 2026

What entropion actually is

Entropion happens when part of the eyelid, most often the lower lid, folds inward toward the eye instead of lying flat against it, as described in the Merck Veterinary Manual's overview of eyelid disorders in dogs. When that happens, the eyelashes and surrounding skin end up rubbing directly against the surface of the eye every time your pet blinks.

That constant friction isn't just uncomfortable. The rubbing can irritate the cornea and, in more serious cases, cause painful ulcers and erosions that scar the eye and affect vision — which is why cases at that level need surgical correction rather than home management.

Understanding why entropion develops

Entropion isn't a condition that appears out of nowhere — it typically falls into one of three recognized categories, and knowing which one applies to your pet helps set the right expectations.

Congenital entropion and developmental entropion are grouped together in veterinary literature as "primary" entropion, since both are structural in origin — congenital entropion is present from birth, while developmental entropion emerges as young, rapidly growing puppies mature, generally before one year of age. Breeds most consistently associated with primary entropion include the Shar-Pei, Chow Chow, Saint Bernard, English Bulldog, Neapolitan Mastiff, Rottweiler, Great Dane, Labrador Retriever, and Golden Retriever.

Acquired entropion is classified separately and develops later in life, usually as a secondary effect of something else: an eye injury or scarring that pulls the eyelid inward, chronic eye pain that causes spasming, or in older pets, a natural loss of muscle tone and fat around the eye that lets the lid roll in over time. It can also be brought on by becoming overweight or having excess facial skin, which places extra pressure on the eyelid.

Because these are three distinct pathways rather than one random event, entropion is something that can often be anticipated — either through breed-related risk in a young, growing pet, or through age and health changes later in life — rather than something that appears without warning.

Signs pet owners should watch for

Why it doesn't resolve on its own

One of the most important things to understand about entropion is that it tends to create a cycle that feeds itself. The irritation from the eyelid rubbing against the eye causes more blinking and eye spasming, and that increased muscle tension often pulls the eyelid even further inward — which means the condition typically worsens the longer it goes unaddressed.

Because of that cycle, home remedies, eye drops alone, or simply waiting it out are not a substitute for veterinary care. Eye conditions in pets are always time-sensitive: what looks like minor squinting today can progress to a corneal ulcer or permanent vision loss within a short window, so any sign of entropion warrants a prompt visit to your veterinarian rather than a wait-and-see approach. At Spay Neuter Vets, surgical correction is the approach we recommend to resolve a structural entropion properly the first time.

How entropion surgery works

The good news is that entropion is very treatable with a straightforward outpatient surgical correction. During the procedure, our team carefully reshapes and repositions the affected portion of the eyelid so it sits normally against the eye instead of rolling inward. The surgery is performed under anesthesia, and pets are able to go home the same day.

As with all of our outpatient procedures, the focus is on precision and a smooth, low-stress experience for your pet from start to finish.

Recovery and aftercare

After surgery, most pets recover well with some simple aftercare at home. Your pet will likely need to wear an e-collar for a period of time to prevent rubbing or scratching at the surgical site while it heals, along with a short window of reduced activity.  Most cases require skin sutures which typically need to be removed within 7–10 days after surgery, so a follow-up visit is an important part of the recovery process, not an optional step. We'll walk you through specific care instructions and any follow-up visits at the time of surgery.

If you've read our guides on spay/neuter aftercare or post-op instructions pet owners often overlook, the same principles apply here: sticking closely to aftercare guidance in the days following surgery makes a real difference in how smoothly your pet heals.

When to reach out to Spay Neuter Vets

Whether your pet is a young, growing puppy of a breed prone to primary entropion, or an older pet developing new eye changes over time, the signs above are worth taking seriously as soon as you notice them. 

If your puppy is a Shar-Pei, Chow Chow, Saint Bernard, English Bulldog, or another breed prone to primary entropion, it's worth having their eyes checked as part of routine puppy visits, even before symptoms appear. If your pet is older and beginning to show eye irritation, tearing, or squinting for the first time, that's also worth a prompt evaluation rather than an assumption that it's minor.

Reach out to our team or submit your pet's case as soon as you notice any of these signs, so we can take a closer look and talk through the right next step for their care.