Is Kibble Bad for Dogs? The Raw Truth You Need to Know

Most of us grew up thinking a bowl of kibble was just… what you feed a dog. It's easy, it's everywhere, and the bags are covered in pictures of happy, healthy-looking dogs. But what if the food in that bag is doing your dog more harm than good?

We know this might be hard to hear. But the evidence is stacking up - and once you know, you can't unknow it.

So, What's Actually in Kibble

Think about what it takes to turn raw ingredients into a dry, shelf-stable biscuit that lasts for months. The answer is extreme heat - and lots of it.

When proteins get blasted at high temperatures, they turn into compounds called heterocyclic amines - known to cause cancer. When fats go through the same process, they become trans fats, also carcinogenic. And across the board, that intense cooking creates Advanced Glycation End Products (AGEs). All you need to know is that AGEs cause inflammation throughout your dog's body every single day, and have been linked to liver disease, kidney failure, diabetes, and early ageing.

So even if the ingredients were perfect, the process of making kibble turns them into something your dog's body has to fight against with every meal.

Many commercial dog foods also contain aflatoxins - toxic compounds that grow on the cheap grain used as filler. And under current FDA regulations, pet food manufacturers are legally allowed to use material from diseased animals, including carcasses showing signs of illness and tissues containing tumours. The exact same material would be immediately banned from human food. But for pet food? It's perfectly legal.

Three Ways Kibble Is Failing Your Dog Every Day

1. Your Dog Is Probably Dehydrated

Kibble is only about 5–10% water. Raw or wet food is around 70% or more. In the wild, dogs got most of their hydration from their food. When dogs eat dry food exclusively, they tend to be chronically low on fluids - putting constant pressure on the kidneys and bladder. Left unchecked, this leads to UTIs, bladder stones, and eventually kidney disease.

2. Way Too Many Carbs

For kibble to hold its shape, it needs at least 10% carbohydrates. Most commercial brands sit between 40–80% carbs. Yet dogs evolved as meat-eaters - carbohydrates were never a significant part of their diet.

All those extra carbs break down into sugars, which feed yeast in your dog's gut. Yeast overgrowth shows up as itchy skin, smelly ears, hot spots, chronic infections, and that familiar corn-chip smell on their paws. It also contributes to obesity, diabetes, and pancreatitis. If your dog has any of these issues, their food is a very good place to start looking.

3. Not All Protein Is Equal

A bag that says "high protein" may actually be delivering mostly carbohydrate bulk with only a fraction of animal-based protein. Manufacturers often use cheap plant-based ingredients like soy, corn, and wheat to inflate the numbers while keeping costs down.

Dogs are designed to get their nutrition from animal sources. The amino acids in meat protein are far more bioavailable than those from plants - so even when the numbers look right on the packet, your dog may not be getting what they actually need.

What About Your Dog Right Now?

Your dog might look totally fine. But many of the conditions linked to poor diet - inflammatory bowel disease, chronic skin problems, kidney disease, diabetes - build quietly for years before they become obvious. Prevention is always easier, and cheaper, than treatment.

Making the Switch to Raw

Don't do it overnight. If your dog has eaten kibble their whole life, their gut has adapted to it. Most dogs transition fine within a day or two, but if yours is more sensitive, a gradual two-week approach works well.

You can also support the process with slippery elm powder or aloe vera capsule powder to help calm and restore the digestive system during the changeover.

Your Two-Week Transition Plan

What If Your Dog Won't Eat It?

Some dogs take to raw food immediately. Others look at you like you've personally offended them. Try a different protein (beef, lamb, chicken, turkey, fish, or novel proteins like rabbit, possum, or wallaby), lightly warm the food to bring out the smell, mix in some bone broth, or experiment with different textures.

 What's Normal During the Transition

Loose stools in the first week or two are completely expected - your dog's gut is rebuilding itself. If diarrhoea lasts more than 24 hours, just slow the transition down a little. MicroMed Probiotics are a great support here, introducing beneficial micro-organisms that help restore digestive balance and get your dog's gut working with raw food much faster. You'll know things are going well when you notice smaller, firmer stools - that means your dog is actually absorbing their food properly.

What Does a Balanced Raw Diet Look Like?

A good raw diet usually includes:

• Muscle meat: the majority of the meal
• Raw meaty bones: always raw, never cooked (cooked bones splinter)
• Green tripe: packed with natural digestive enzymes and beneficial bacteria
• Organ meat: liver and kidney are nutrient powerhouses; keep to around 10–15% of the total

At MicroMed we recommend the PMR (Prey Model Raw) diet if there are any yeast or fungal issues at play - first symptoms are usually a yeasty, corn-chip odour. Otherwise, a BARF diet is fine and includes a small amount of vegetables too.

Making it yourself gives you full control, but it takes time and research to get the balance right. Buying pre-made raw food is the easier option - a good supplier does the nutritional homework for you.

Where to Find Raw Food in New Zealand

• The Raw Dog Food Co — Auckland
• Cats and Dogs Dinner Company — Wellington
• Best for Pets — Christchurch
• Pet Naturals Orewa — Orewa
• Otago Petfoods — Otago
• Petsmart NZ — Invercargill
• Pet Direct — Auckland and Christchurch
• All Good Petfood — Kerikeri
• Pet Pitstop — Alexandra

The Bottom Line

That bag of kibble in your pantry is convenient. But convenience has a cost — and your dog is the one paying it.

Raw feeding isn't some fringe idea. It's simply going back to what dogs were built to eat: real food, in a form their bodies recognise and can actually use. The changes people notice after switching are real: shinier coats, more energy, better digestion, fewer vet visits. Not because raw food is magic, but because it's appropriate.

You don't have to do it all at once. Just start with the first step.

Here's the Science

What Recent Research Shows

The science has moved fast in recent years. A 2025 controlled study from the University of Helsinki's DogRisk team found that kibble-fed dogs showed elevated TyG index scores - a validated marker for insulin resistance. Raw-fed dogs showed the opposite pattern. Put simply: the kibble dogs' bodies were struggling with their food. The raw-fed dogs' bodies were working with it.

A 2024 study from Oklahoma State University compared gut microbiomes and inflammatory markers in raw-fed versus kibble-fed dogs. Raw-fed dogs had significantly more diverse gut microbiomes and stronger immune markers. Kibble-fed dogs had measurably higher inflammation. A 2025 review in Microorganisms confirmed that high-carbohydrate extruded diets are consistently associated with lower gut microbial diversity and disrupted short-chain fatty acid production - both linked to poorer immune function and higher rates of chronic disease.

The Gut–Skin Connection

A 2025 study from Seoul National University found that dogs with atopic dermatitis had significantly less diverse gut microbiomes than healthy dogs. When given probiotics for 16 weeks, their skin symptoms improved and gut diversity recovered. The gut–skin axis is real - and has real implications for managing and preventing skin problems in dogs.

Probiotics and What's Coming Next

A 2026 pilot study confirmed that probiotic supplementation during a dietary change supports faster microbiome recovery, reduces diarrhoea, and helps the gut rebalance more quickly. A 2025 clinical trial also found that a postbiotic form of Bifidobacterium animalis subsp. lactis significantly reduced post-meal blood glucose spikes in dogs - meaningful for metabolic health, especially in dogs already showing signs of insulin dysregulation. In 2025, the JAVMA published a review concluding that the most effective approach to managing chronic disease in companion animals combines diet reform with gut microbiome support. Diet, the review noted, is consistently the single most powerful lever available.

Disclaimer: This content is for informational purposes only and is not meant to diagnose, treat, or replace consulting a primary veterinarian for individualized care.