Skin & Allergies

French Bulldog Ear Infections That Keep Coming Back: The Diet Link

By Alessa Grimm · Pet Nutritionist · Author of Healthy Frenchies

· · ·

You know the cycle by heart. The head shaking starts. There is that smell. Off to the vet, drops for a fortnight, and within days your Frenchie is comfortable again and you feel enormous relief. Six weeks later, the head shaking starts.

Here is the thing I most want you to take from this article: if the ears keep coming back, the ear is almost never the problem. It is where the problem shows up. Treating the infection again and again is like mopping the floor while the tap is still running. The mopping is necessary. It is just not the answer.

Your Frenchie Has the Good Ear Shape, and Still Gets This

This is the part that changed how I think about Frenchie ears, and it is worth sitting with.

VetCompass researchers looked at a random sample of 22,333 dogs under UK primary veterinary care and found that 7.30% were diagnosed with otitis externa in a single year. They then asked which dogs were most at risk, and ear carriage came out as one of the two highest ranked factors. Breeds with pendulous ears had 1.76 times the odds, and breeds with V-shaped drop ears 1.84 times the odds, compared with breeds with erect ears.

Erect ears are the low risk shape. Those big upright bat ears your Frenchie is famous for are, on the face of it, the best ear design in the room. Open, airy, nothing hanging over the opening to trap warmth.

And yet. A VetCompass study of 2,228 French Bulldogs found otitis externa recorded in 14.0% of them, the single most common specific disorder in the breed, well ahead of diarrhoea in second place at 7.5%. Those are two separate studies from two different years, so it is not one clean like for like comparison and I am not going to dress it up as one. But it is roughly double, in a breed carrying the ear shape linked to the lowest risk.

You cannot explain that with anatomy alone. Something else is doing the work, and the same research team points at it directly: the probability of otitis externa, they write, varies widely between dogs depending on their tendency towards other skin problems such as allergic skin disease.

So when someone tells you Frenchie ears are just like that, they are half right and it is the less useful half.

What Is Actually Happening In There

Ear infections in Frenchies usually run in a predictable order, and understanding it tells you where to intervene.

1. Something inflames the lining of the ear canal. Most often allergic skin disease, whether that is food or environmental. The ear canal is skin, folded into a tube. Whatever irritates the skin on the belly and between the toes irritates the skin in there too.
2. The inflamed canal swells and narrows. Flat faced breeds are commonly described as having narrower ear canals to begin with, and a swollen canal is worse at ventilating and worse at clearing wax out.
3. Warm, damp and dark is a wonderful place to live. Yeast and bacteria that were sitting there harmlessly start to multiply.
4. Now you have an infection, and now you can smell it.

Drops handle steps three and four beautifully. They do nothing at all about steps one and two. So the canal stays inflamed and narrow, and in a few weeks you are back at step three.

That is why recurrence is the important signal. One ear infection in a Frenchie's life is bad luck. Three in a year is information.

Where Food Comes Into It

Let me be careful here, because ears sell a lot of expensive dog food on very thin evidence.

Food is not the only cause of recurring ear trouble, and it is not even the most common one. Environmental allergy is more common overall, and I have written the full side by side comparison in French Bulldog itchy skin: food allergy or something else?

What food does have going for it is this: it is one of the very few causes you can identify precisely and then remove completely. You cannot remove pollen from Australia. You can remove chicken from a bowl.

And ears are a genuinely food-suggestive sign. In the systematic review of how adverse food reactions actually present in dogs, otitis externa sits among the most frequently reported skin manifestations, alongside recurrent bacterial and yeast infections. Ears are not a footnote in food allergy. They are one of its main venues.

The pattern that leans towards food, rather than pollen:

• Ears that flare all year round rather than seasonally
• Ear trouble travelling with paw licking, itchy skin or tummy upset
• Trouble that started young, before two years old
• Infections that return within weeks of every course of treatment, indefinitely
• Both ears, repeatedly. One ear over and over is more suggestive of something local, like a foreign body or a growth, and deserves a proper look from your vet

What the Newest Research Suggests, and What It Does Not

A trial published this year is worth knowing about, with its limits stated honestly.

In a six month randomised, blinded, controlled trial, dogs with atopic dermatitis were fed either a therapeutic diet formulated to support the skin barrier or a control diet. Over the six months, 25.0% of dogs on the therapeutic diet had a recurrence of otitis externa, compared with 61.1% on the control diet.

Now the caveats, because they matter. This was a small trial, 34 dogs in the analysis. It tested one specific commercial therapeutic diet, not home cooking and not raw. And the dogs had atopic dermatitis, meaning environmental allergy, not food allergy.

So this is not evidence that fresh food cures ear infections, and I am not going to pretend it is. What it does suggest is more interesting and more modest: that what goes in the bowl can shift how often ears flare, even in dogs whose allergy is not caused by food at all. The bowl is a lever on inflammation generally, not only a way to avoid a trigger.

What to Actually Do

1. Treat the infection that is there now, with your vet

Please do not attempt to fix an active ear infection with diet. It is painful, it can damage the ear canal over time, and it needs treating. Ask your vet for ear cytology, where they look at a swab under the microscope. It tells you whether you are dealing with yeast, bacteria, or both, which changes the treatment. If nobody has ever looked down your Frenchie's ears with an otoscope between episodes, ask for that too.

2. Ask the question that changes things

Not "what do we treat this with", which your vet is already answering well, but "what is causing this to keep coming back". That single question moves the conversation from management to investigation. A good vet will be pleased you asked.

3. Then, if the pattern fits, investigate the food properly

If the ears run all year, come with paw licking or itchy skin, and return after every treatment, food is worth ruling in or out. Not by switching brands, which tells you nothing, but with a structured trial. I wrote the whole method out last week in The French Bulldog Elimination Diet: A Step-by-Step Plan, including how to keep a single protein bowl properly balanced while it is stripped back.

One warning specific to ears, and this is from what I see rather than from a trial: they are usually the slowest sign to respond. Digestion often settles in two to four weeks and skin in six to eight, but ears routinely lag behind both and can still be improving at week twelve. If you judge your trial by the ears at week four, you will conclude food was not the problem when the answer was simply still on its way.

The Cleaning Mistake Almost Everyone Makes

When ears keep getting infected, the instinct is to clean them more. It feels like doing something. It usually makes things worse.

The VetCompass researchers put this in their own recommendations, advising avoidance of overzealous ear cleaning as part of a low harm approach to prevention. A healthy ear canal is self cleaning and has its own defences. Scrubbing it weekly with cotton wool and solution strips those defences, irritates the lining, and pushes debris further in.

My rule, and please do check it against your own vet's advice for your dog:

• Clean ears with no smell: leave them alone. A dry wipe of the visible outer flap after a bath or a swim is plenty.
• Ears that need cleaning: use a proper veterinary ear cleaner, at the frequency your vet gives you, for as long as they say and not indefinitely.
• Never: cotton buds down the canal, water, vinegar mixes, or anything you read about in a Facebook group.
• Always dry the ears after swimming or a bath, since moisture is one of the few genuinely mechanical parts of this.

The Diet Levers Worth Pulling Anyway

Whatever the trigger turns out to be, a few things lower the background inflammation while you work it out.

Get omega-3 in. Oily fish is my preferred source, sardines especially. In my own recipes I swap two sardines in for the cod liver oil once or twice a week, tinned in spring water rather than oil or brine, and rinsed first. It supports the skin lining the ear canal exactly as it supports skin anywhere else. Treat it as a helper, not a cure.

Take vegetable oils out. This one is free and it is the half people forget. Vegetable oils push the omega balance the wrong way in a dog you are trying to calm down. Check the label of anything commercial in the bowl.

Keep the diet simple and varied over time. A dog eating four rotated proteins is easier to investigate than one eating a food with eleven ingredients, and easier to fix when you find the culprit. The complete safe foods list is a good place to start, and the free Food Amount Calculator handles the amounts. If you would rather not do the ratios by hand, the Recipe Builder will scale a balanced plan to your own dog.

Watch the treats. Chicken is the default protein in almost every training treat and dental chew on the shelf, and it is one of the more commonly confirmed food allergens in dogs, as I covered in the chicken article. A spotless dinner plus six chicken treats a day is not a chicken free diet.

Keep them lean. This is not an ear treatment and I will not sell it as one, but the Purina lifetime study linked a lean body condition to a longer life in dogs, and a lean Frenchie is easier on every system including the skin. You get it for free alongside everything else.

Ear Questions I Get Asked

Why does my French Bulldog keep getting ear infections? Because in most cases the infection is the second thing that happens, not the first. Something inflames the ear canal, usually allergic skin disease, the canal narrows and traps moisture, and yeast and bacteria move into the warm damp space. Treatment clears the infection but not the inflammation underneath, so it comes back. Ears that keep returning are a signal to look for the trigger rather than to keep buying drops.

Can food allergies cause ear infections in French Bulldogs? Yes. Otitis externa is one of the most frequently reported skin signs in dogs with an adverse food reaction, alongside recurrent bacterial and yeast infections. Food is not the only cause of recurring ears, and environmental allergy is more common overall, but food is one of the few causes you can identify and remove completely.

Is it just because French Bulldogs have narrow ear canals? Narrow canals are part of it, but they do not explain the whole gap. In UK primary care data, breeds with erect ears, which includes French Bulldogs, had lower odds of otitis externa than breeds with pendulous or V-shaped drop ears. Frenchies have the ear carriage associated with the lowest risk and still record roughly double the rate of dogs generally. That points to something driving inflammation, not just the shape of the ear.

How often should I clean my French Bulldog's ears? Less often than most people think. The VetCompass researchers specifically recommend avoiding overzealous ear cleaning, because scrubbing a healthy canal strips its natural defences and irritates the lining. If the ears are clean and odour free, leave them alone. Cleaning is for ears that need it, on your vet's advice, not a daily ritual.

Will changing my dog's food fix the ear infections? Only if food is the trigger, and switching at random will not tell you. If your Frenchie's ears run all year, come with paw licking or itchy skin, and return within weeks of every treatment, a properly run elimination diet is how you find out. Treat the current infection with your vet first, because an untreated infection will keep the ear sore no matter what is in the bowl.

How long do ears take to improve on an elimination diet? In my experience ears are the slowest sign to settle. The published work on trial length measures overall remission rather than ears specifically, but the pattern I see is digestion improving in two to four weeks, skin in six to eight, and ears lagging behind both and sometimes still improving at the end of a twelve week trial. Judging a trial by the ears at week four is the most common way owners talk themselves out of an answer that was coming.

My vet keeps prescribing drops. Should I ask for something else? Drops are the right treatment for the infection in front of you, so this is not a case of the vet getting it wrong. The useful question to add is what is causing the recurrence. Ask about ear cytology to identify what is actually growing, whether the canal is inflamed between episodes, and whether it is time to investigate an underlying allergy.

Do omega-3 supplements help with ear inflammation? They support the skin lining the ear canal in the same way they support skin anywhere else, so they are worth including, but treat them as a helper rather than a fix. Oily fish such as sardines is my preferred source. Just as important is what you take out: keep vegetable oils out of the bowl, since they push the omega balance the wrong way in a dog you are trying to calm down.

Simple Takeaway

Ear infections are the most commonly recorded problem in French Bulldogs, at roughly double the rate of dogs generally, and that is despite them having the erect ear shape linked to the lowest risk. So it is not simply how they are built. The ear is usually where an inflamed dog shows it first. Treat the infection properly with your vet, ask for cytology, then ask the better question: what keeps causing this. If the ears run all year and travel with itchy skin or paw licking, investigate food properly with an elimination diet, and be patient, because ears are the slowest thing to come good. Clean less than you think. Get omega-3 in and vegetable oils out. A Frenchie who stops getting ear infections is not a lucky dog, they are a dog whose trigger somebody finally found.

Next Tuesday: tear stains, and whether diet can really do anything about them.

This article is part of The Complete French Bulldog Allergy Guide, the hub for the whole allergy journey.

You’re already doing an amazing job. This is just here to help.
With love, Alessa xx ♥

Alessa Grimm, Pet Nutritionist

Alessa studied pet nutrition in Germany and shares her life with two French Bulldogs, Audrey and Raphy. She is the author of Healthy Frenchies: The Complete Guide to Nutrition and built the free Food Amount Calculator used by Frenchie owners worldwide.