I’ve been there, facing the very same challenge: my cherished cat, Muezza, would only eat fish and fish-flavored food. While there are understandable reasons for this strong preference, it truly becomes a concerning issue when they stick to only this one type of food.
So, I became quite desperate to figure out what to do if my cat would only eat fish-flavored cat food. After a lot of searching and trial-and-error, I found several effective approaches, including a gradual transition away from solely fish-flavor to other food varieties, offering a wider range of protein sources, and using enticing food toppers.
Is your cat acting like Muezza too? Here, I’ll detail why this happens and, more importantly, the practical solutions.
Why Your Cat Loves Fish-Flavored Foods So Much
Before the addressing approaches on what to do if your cat loves only fish-flavored food, I think you must know why your cat is acting like this.
Cat’s higher interest in fish-flavored foods has several reasons. Let’s check out that one by one.
Ancestral Characteristics: A Historical Connection
Historically, domestic cats are believed to have first emerged in the Egyptian civilization, somewhere between 3,600 to 10,000 years ago. As noted by the Nature Journal , the Nile-based population played a significant role in transforming wild cats into the pets we know today.
Ancient Egyptians relied on these pet cats to protect their farms from rodents and their grain storage from pests. National Geographic even highlights another fascinating reason for Egyptians’ fondness for cats: they considered them magical animals that could fight evil spirits.Crucially, the Egyptians’ primary source of protein from the Niles was, logically, fish. And, in turn, they fed their cats with these abundant fish. According to historians, this is how cats became so familiar with fish, and over time, it slowly evolved into one of their most desirable food sources.

Here is a picture from the Tomb of Nakht showing a pet cat eating fish which is not a self-catch but provided by the master.
Cats Like Fish Smell
You must have noticed how your cat becomes crazy after getting the fish smell. Your cat’s love of fish-flavored foods also has some biological reasons. Cats have a unique sense of smell that goes beyond what humans experience.
Along with their nose, they have particular vomeronasal organs. These organs, also known as Jacobson’s organs, connect their mouth and nose. Vomeronasal organs amplify their sense of smell and taste.
Due to having these amplified taste buds, cats become wild and make them insist on fish-flavored food every time. Their senses are so sensitive that the fishy aroma and taste become irresistible to them.
The Power of Protein in Fish
Like every other living animal on the earth, cats are also naturally aware of nutrition needs. By their natural instinct, cats know that protein is really important to stay energized and strong.
They naturally look for foods that are packed with protein because it helps keep them healthy. When cats have eaten fish before, they feel the good effects of all that protein.
And this is how they become fond of fish so much. Their instinct tells them that fish-flavor food can make them strong and healthy.
Fish Contains Omega-3 and Taurine
First of all, cats need Taurine for some proper bodily functions like their heart rhythm, digestion, reproduction, etc. Fish contains this Taurine. So, when cats consume fish and get more Taurine from it, they experience improved health and well-being.
This positive effect encourages them to develop a preference for fish-flavored food.
Secondly, Omega-3 fatty acid has a great contribution to keeping your cat’s fur healthy and appealing. Those silky and soft furs not only appeal to you but also provide comfort to your cat. Now, when cats eat fish, they notice that their fur becomes softer and shinier as a result.
This context encourages them to keep consuming fish-flavor food to maintain that level of comfort and improve their self-grooming habits.
Is Only Fish-flavored Food Consumption Healthy for Your Cat?

I expect that you already know about the nutrient contents in fish from our discussion above. In short, fish are rich in Omega-3s, Taurine, protein, and more. And these are undeniably very important elements for your cat’s health.
“So, what’s the problem?” you might be asking, right?
The core issue is that while cats certainly need the nutrients found in fish, they also require a wide array of other essential nutrients, including specific fats, carbohydrates, a full spectrum of vitamins (like Vitamin K and certain B vitamins), and a diverse range of minerals (such as calcium, phosphorus, iron, and zinc).
While many cat food manufacturers are highly concerned about including Omega-3s, Taurine, and protein in their fish-flavored formulas, the comprehensive balance can sometimes be lacking. I must admit, they do add other nutrients, but often not all of them, or not in the precise ratios cats need. Some might prioritize fats and minerals, while others focus on specific vitamins like A, B, and C. Can you see the picture forming? These cat foods might provide excellent fish-related nutrients but can unfortunately fall short in other critical nutritional categories, potentially leading to nutritional imbalances over time.
Now, check the table below to understand the potential consequences of your cat’s exclusive fondness for fish-flavored foods.
Issues | Potential Consequences |
Nutritional Imbalance | Obesity, heart disease, diarrhea, thiamine deficiency (leading to neurological issues), weakness, poor growth, compromised immune system, organ damage. |
Imbalance in fatty acids | Skin issues, dull coat, inflammation. |
Allergies | Fish is a common allergen for cats, potentially leading to gastrointestinal upset, itchy skin, or chronic ear infections. |
Mercury/Heavy Metal Risk | Accumulation of toxins from certain fish, especially larger, longer-lived species, can lead to neurological problems or kidney damage over time. |
Urinary Tract Issues | Some fish-based diets can contribute to imbalances that may predispose cats to certain urinary crystals or stones. |
Overall Health Deterioration | A lack of dietary variety can lead to food aversions, making it harder to introduce new foods later, and potentially causing long-term health problems if critical nutrients are consistently missing. In severe cases, prolonged deficiencies can be life-threatening. Consult your vet immediately if your cat shows signs of lethargy, vomiting, persistent diarrhea, or unusual weakness. |
What to Do If Your Cat Only Eats Fish-Flavored Foods?
If you are worried about your cat’s excessive affection towards fish-flavored food, then applying the below-listed approaches can be incredibly helpful. I have personally found these effective in encouraging Muezza to eat a wider variety of foods.
- Implement a Gradual Transition: The most effective approach is to go for a gradual transition from only fish-flavored foods to other food flavors. You can start by introducing very small amounts of alternative cat food flavors mixed in with their current favorite.
I am not suggesting discarding the fish-flavored food completely right away. For instance, if you usually give 120 grams per meal, try giving just 20 grams of the new, other-flavor food along with 100 grams of their familiar fish-flavor food. Slowly increase the new food’s proportion and decrease the fish-flavored food’s proportion over several days to weeks. This makes the change less stressful for your cat. - Offer a Variety of Protein Sources: Broaden your cat’s palate by offering a variety of other high-quality protein sources, such as chicken, turkey, beef, or lamb. I suggest you try raw (if safely prepared and approved by your vet), dry kibble, and steam-cooked versions. Think of it as an experiment to identify which textures and preparations your cat likes most.
- Mix in Non-Fish Food with Enticing Toppers: To make non-fish food more appealing, add enticing food toppers or mix-ins to enhance its flavor and aroma. Consider using small amounts of low-sodium broths, sardine water (without bones or added salt), or even a tiny sprinkle of nutritional yeast. Regularly rotate the flavors of non-fish cat food to keep mealtime interesting and prevent your cat from getting bored or developing new single-food preferences.
- Seek Veterinary Help Promptly: Consulting with your veterinarian is crucial to get personalized recommendations tailored to your cat’s unique health needs. The vet can assess your cat’s overall health, rule out any underlying medical conditions causing pickiness, and provide you with effective, safe guidelines to manage your cat’s strong preference for fish-flavored foods. They can also advise on specific nutritional supplements if deficiencies are suspected. [Find a Certified Veterinary Nutritionist]
Watch this YouTube Video to learn more about transitioning your cat from one food to another:
My Favorite Jackson Galaxy Explaining:
How to Transition Your Cats to a Different Diet
Best alternatives to fish-flavored cat food
There are other food sources that can offer similar benefits to fish-flavor food. Some must-mentions are foods with the flavor of chicken or turkey, beef, lamb, duck, rabbit, etc. These are the prominent alternatives to fish-flavor food.
However, I should notify you of the price: Depending on the brand, per pound can cost you around $25-$43.
People Also Ask
Here, I answer some of the most common questions people also ask regarding cats eating only fish-flavored food.
Can I add supplements to my cat’s diet if they only eat fish-flavored food?
Adding supplements to your cat’s diet can be beneficial, but it is important to consult with your veterinarian before doing so.
What is the chance my cat will like other flavors over fish-flavored food?
I say there is a 100% chance. After all, it’s about the habit. I suggest you keep patience and apply the mentioned approaches consistently.
Can I make my own fish-flavored cat food at home?
Yes, you can. But, preparing homemade cat food requires careful attention to meet all of a cat’s nutritional needs. I advise you to consult with a veterinarian or a veterinary nutritionist before attempting to make such food.
Final Words
I hope you have a clear answer of what to do if your cat will only eat fish-flavored food. While cats may have a strong preference for fish-flavored foods, it is important to ensure their diet is balanced. The diet must provide all the necessary nutrients for their overall health and well-being.
To restrict your cat’s affection from only fish-flavored dietary habits, you should introduce a variety of protein sources and flavors while consulting with a veterinarian.
Remember, providing a balanced and diverse diet is key to keeping your beloved feline friend, like Muezza, happy and healthy for years to come.