Is Milk Good for Cats? And Other Myths You Shouldn’t Believe

The Great Milk Myth

I am lactose intolerant. And, as it turns out, so was one of my cats. Three decades ago, I had no idea that milk could be a problem for felines. So, like any well-meaning cat parent, I poured a nice bowl of milk, thinking I was treating my furry friend to something special. What happened next? Diarrhea. A lot of it. Lesson learned. Since then, I’ve never given milk to a cat again, just to be on the safe side.

But that got me thinking: How many other common cat food myths are out there? Turns out, a lot! Let’s bust the biggest ones, starting with the most famous of all.

1. Is Milk Good for Cats?

Nope! Despite what old cartoons and movies show, milk is NOT a great treat for cats.

Why?

Most adult cats are lactose intolerant, meaning their bodies don’t produce enough lactase – the enzyme needed to break down lactose (the sugar in milk). The result? Upset stomach, bloating, diarrhea, and gas. Not exactly the delightful snack they were hoping for!

What About Kittens?

Kittens can digest milk, but only their mother’s milk. Once they are weaned, their ability to digest lactose decreases dramatically. Giving them cow’s milk can lead to the same tummy troubles.

Better Alternative:

If your cat loves milk, you can try lactose-free cat milk, which is specially made for their sensitive stomachs. But honestly? Fresh water is the best choice.

2. Can Cats Eat Raw Fish?

It sounds logical – cats love fish, right? But raw fish is not a great idea for a few reasons:

• Enzyme Issues: Raw fish contains an enzyme called thiaminase, which breaks down vitamin B1 (thiamine) in cats. A lack of B1 can lead to neurological issues.
• Parasites & Bacteria: Sushi might be delicious for us, but raw fish can carry parasites and bacteria that could make your cat sick.

Better Alternative:

Cooked fish (plain, without salt, garlic, or seasoning) is a much safer treat. But don’t make it a daily habit – too much fish can cause nutrient imbalances.

3. Is Tuna a Good Everyday Meal for Cats?

Tuna is delicious. Cats love it. But feeding them tuna every day? Not a great idea.

Why?

• Too Much Mercury: Tuna, especially the kind meant for humans, contains high mercury levels. Over time, this can lead to mercury poisoning.
• Not a Complete Diet: Tuna lacks essential nutrients, like taurine, which cats need to survive. A diet of only tuna can lead to malnutrition.
• Tuna Addiction: Yes, it’s a thing! Some cats become so obsessed with tuna that they refuse to eat anything else. This can make feeding them a nightmare.

Better Alternative:

An occasional tuna treat is fine, but stick to tuna-flavored cat food or small amounts of canned tuna in water (not oil or brine).

4. Do Cats Need a Bowl Full of Dry Food All Day?

Leaving a big bowl of kibble out 24/7 seems like an easy way to feed your cat. But free-feeding can lead to:

• Obesity – Most indoor cats are not great at self-regulating their food intake.
• Boredom Eating – Just like humans snack when bored, cats do too!
• Higher Risk of Diabetes – Dry food is often high in carbs, which can contribute to diabetes.

Better Alternative:

Try measured portions at set times or use an automatic feeder. If your cat prefers grazing, give them a smaller amount multiple times a day instead of one overflowing bowl.

5. Can Cats Eat Dog Food?

I get it. You ran out of cat food, and the dog’s kibble is sitting right there. But wait!

Why It’s a Bad Idea:

• Cats and dogs have different nutritional needs – Cats need taurine, an amino acid that dog food often doesn’t contain. A taurine deficiency can lead to blindness, heart disease, and other serious health issues.
• Protein Differences – Cats need more protein than dogs do. A steady diet of dog food won’t meet their energy and muscle needs.

Better Alternative:

If you’re in a pinch, feeding your cat dog food for one meal won’t hurt. But long-term? Stick to cat food.

The Truth About Cat Nutrition

There’s a lot of misinformation out there when it comes to feeding cats. Marketing, tradition, and old-school advice have made some of these myths stick around for generations. But now you know better!

❌ Quick Recap – What’s NOT Healthy for Cats?

• Milk – Causes stomach upset.
• Raw Fish – Can destroy vitamin B1 and may carry parasites.
• Tuna (Every Day) – High in mercury and lacks key nutrients.
• Unlimited Dry Food – Can lead to obesity and diabetes.
• Dog Food – Lacks essential nutrients for cats.

✔ What’s Best for Cats?

• Fresh water
• Balanced cat food (wet & dry)
• Occasional safe treats
• Portion-controlled meals

FAQ: Busting Cat Food Myths – What You Need to Know