The Dog Deaths From Raw Meat: What Went Wrong

Updated September 3, 2021

Update 3 August: What a difference a week makes!

The Maffra District Knackery has now admitted that they processed horses from the Northern Territory.

Now read on to see why it was always the most likely explanation…

An outbreak of liver failure in Victorian dogs has been linked to raw meat from a local supplier. At least 14 dogs died and a further 30 were hospitalised.

I’ve been following the story carefully. The more we know the stranger it gets.

Why The Dogs Died

We now know that the dogs died after being poisoned by indospicine, a toxic amino acid found in many plants of the Indigofera genus. The suspicion that it came from their food is strong enough to make the following statement: fresh or frozen raw pet meat sourced from Gippsland between 31 May and 3 July should not be fed to dogs.

This includes products sold across more than 30 stores described as beef and kangaroo pet meat.

Whether cooked or raw, meat containing indospicine is very toxic to dogs. Once you see where it comes from, you might share my concerns about all raw pet meat. You might also wonder if cats are at risk, given that they don’t get the same level of attention*.

Where Indospicine Comes From

There are six plants known to contain high levels of indospicine, but only one of significance to us: Indigofera linnaei or Birdsville Indigo. The map at the start shows it to be widely distributed across the northern half of Australia.

So how did it get into Victorian dogs?

The answer is that it accumulates in the meat of animals which graze on it. Birdsville Indigo is a tough drought-tolerant plant with a deep taproot, able to exploit seasonal rainfall before anything else does. As a result, it’s often the only decent food available for livestock.

Deaths in Australian dogs have been previously documented from the eating of camel meat1 and horse meat2. In both cases these animals were presumably grazing in the areas on the map. In fact, we’ve known since at least 1952 that the plant is the cause of Birdsville Horse Disease3.

Which I hope begs the obvious question: if we already knew about it, how did it happen?

The Raw Pet Meat Business

Meat is expensive, and only getting more so. Up against that is an increasing demand from dog owners for raw meat at affordable prices. The result is an unstable balancing act where the pressure is always on to find a workaround.

In this case, that workaround was probably meat brought in from the Northern Territory. Not that I’m not blaming the NT at all: they actually have some pretty tough regulations designed to prevent just this sort of thing.

Here are three examples from their laws:

  • A person shall not sell pet meat unless it is dyed blue in the prescribed manner
  • A person shall not slaughter a horse, donkey, mule or hinny for pet food if he or she knows, or has reason to suspect, it has been in an area in which Birdsville Horse Disease occurs
  • A person shall not sell meat for human consumption, pet meat or bait meat with intent to deceive the buyer as to the true identity of the meat

So What Exactly Happened?

I think there is only one sensible answer: the meat came from horses transported from the NT into another state prior to slaughter. Here’s why:

  1. Illegal slaughter is very unlikely in Australia anywhere
  2. Camels could be slaughtered legally for pets in NT but the meat would be dyed blue
  3. Cattle (beef) are improbable as they haven’t been associated with indospicine poisoning
  4. Horses, donkeys etc would have come from areas in which Birdsville Horse Disease occurs and therefore be illegal to slaughter in the NT
  5. Of the likely species, horses are the easiest to transport to another jurisdiction
  6. Outside of the NT, meat sellers don’t always need to tell us what species the meat actually comes from

If I’m right, this is all legal, just very unethical.

Name That Species, Please

I’ve written about meat substitution before, and the only thing preventing me taking it further is the prohibitive cost of species-of-origin DNA testing. Even if the meat that killed these dogs was actually beef, it still must have come from areas where such meat should not be fed to dogs.

And in fact, as vets we should be looking harder at any cases of unexplained liver disease in dogs. We should be asking about access to pet meats in the same way we’re asking about grain-free diets in heart disease.

One thing for sure is that there’s still a lot more of this saga to come out. Whether that happens or not is another story.

In the meantime, I hope this makes us think twice about cheap ‘pet meat’. And if you ever see meat actually marked as horse or camel, you should only buy it if the seller can guarantee it’s not contaminated with indospicine. How they can, I’m not sure.

Related: Should I add meat to my dog’s kibble, anyway?

Have something to add? Comments (if open) will appear within 24 hours.
By Andrew Spanner BVSc(Hons) MVetStud, a vet in Adelaide, Australia. Meet his team here.

* Try putting “canine” and “feline” into Google Scholar and look at the number of results. You’ll see a 3:1 bias in favour of dogs.

† Those 6 plants:

  • Indigofera hendecaphylla
  • Indigofera linnaei
  • Indigofera lespedezioides
  • Indigofera spicata
  • Indigofera vicioides
  • Indigofera volkensii

They are all low shrubs found in livestock grazing lands from Africa, through Asia and the Pacific Islands, to North, Central and South America. It makes you wonder if it’s also happening to less ‘affluent’ dogs elsewhere. Just look at how long it took us to notice a new exotic disease even in Australia when it was happening far away from the capital cities.


  1. FitzGerald, L. M., Fletcher, M. T., Paul, A. E. H., Mansfield, C. S., & O’Hara, A. J. (2011). Hepatotoxicosis in dogs consuming a diet of camel meat contaminated with indospicine. Australian veterinary journal, 89(3), 95-100
  2. Hegarty, M. P., Kelly, W. R., McEwan, D., William, O. J., & Cameron, R. (1988). Hepatotoxicity to dogs of horse meat contaminated with indospicine. Australian Veterinary Journal, 65(11), 337-340
  3. Hegarty, M. P., & Pound, A. W. (1968). Indospicine, a new hepatotoxic amino-acid from Indigofera spicata. Nature, 217(5126), 354-355
  4. Tan, E. T., Ng, J. C., Al Jassim, R., D’Arcy, B. R., Netzel, G., & Fletcher, M. T. (2020). Emerging food safety risk of hepatotoxic indospicine in feral Australian camel meat. Food Control, 113, 107205
Picture credits: MargaretRDonald, CC BY-SA 4.0, via Wikimedia Commons (map), and Mark Marathon, CC BY-SA 3.0, via Wikimedia Commons (plant)

6 Replies to “The Dog Deaths From Raw Meat: What Went Wrong”

  1. Like Molly Patton, our two dogs were killed by the meat from the Maffra Knackery after unethical practices with meat sold as beef. Although they are guilty by confession of compensation, they have not lost a minutes income from their questionable practices, which should be addressed by people who can make a difference. There were government departments involved in the investigation and it went no further. I now only feed human grade meat and use pasta and veg as the bulk instead of kibble, as I don’t trust that either from the reports of 2017/8 Mars Megaoesophagus debacle. I am still shattered by the senseless deaths of two beautiful Greyhounds who didn’t deserved a hideous death.

    1. Hi Sue. I have to agree that the consequences seemed very minor for what didn’t look much like an accident and led to such widespread suffering.

      1. Thanks Andrew, the suffering extent will never be truly known, although I can comment that we are still suffering from our dogs deaths. As far as I am aware, there were 27 dogs who died and over 70 affected and many still suffering liver damage and other effects of the toxic meat.

  2. Both my dogs have chicken intolerance, I was buying human grade chicken and steaming it served with veggies etc. I was feeding mostly chicken because I thought it the safest. Both dogs are good on crocodile and kangaroo. I buy minced kangaroo human grade from supermarket which is generally cooked with veggies etc but sometimes served raw. Is this safe for my dogs. I find the commercially prepared one protein crocodile product very expensive as a long term feeding regime.

    1. Hi Pauline. It’s hard feeding dogs with a chicken intolerance as nearly all commercial foods will contain it. What you’re doing sounds good, though of course I can’t comment on the balance of the diet. There are also commercial diets you can buy that either are lacking in chicken or have been treated with proteolytic enzymes to reduce the antigenicity of the chicken. The most extreme forms are listed on our page about elimination diets.

  3. Thanks for shining a light on this. My dog was one of the dogs killed in this saga and my family’s dog is still fighting ongoing health issues. As wrong as it is that the pet food industry is not better regulated, it seems educating pet owners on things to look out for is the most effective way forward to ensure our beloved fur family stays safe and healthy.

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