Toxic Foods - Blog Posts

WHY you shouldn’t feed these 10 foods to your dog

Dogs might think they’re human, but their physiology is not like ours. Humans might eat a wide variety of foods with little concern, but there are some very common human foods which you should not feed to your canine companion. You’ve probably seen the foods on this list before, but this is WHY these foods should not be fed to dogs.

Chocolate, Theobromine and Caffeine:

Everybody’s heard that chocolate is bad for dogs, and it’s true. Chocolate contains a compound called Theobromine. Theobromine is a type of compound called a methylxanthine, and another methylxanthine you might be more familiar with is caffeine. We know quite a lot about these compounds, as humans use them both medicinally and recreationally. The long version is that they all inhibit phosphodiesterase and antagonise adenosine receptors. The short version is that they increase muscle activity, including the heart, and stimulate the central nervous system.

This presents as dogs that have fast and irregular heart rates, high body temperatures and increased muscle activity that can progress to seizures.

It takes a reasonable amount of chocolate to poison a dog. One M&M isn’t going  to do it. For a 35kg dog it’s going to take at least 3500mg of theobromine, which is about 5kg of typical milk chocolate. But only 1.2kg of dark chocolate or 600g of cooking chocolate, which is possible.

A 10kg dog needs much less. 1.5kg of milk chocolate would do it, which is only about 3  large Easter Bunnies, or 300g of dark chocolate, which is one packet from the cooking isle.

Chocolate is super tasty, dogs will absolutely gorge themselves on all chocolate available, so it’s not too difficult to poison smaller dogs with it.

And even if you get the dog through the toxicity, the high fat content of chocolate can go on to cause other gastrointestinal problems.

Onions & Garlic:

Yes, I said onions AND garlic. All allium species contain the same potentially toxic compounds, whether raw or cooked. That goes for spring onions too, it’s just really difficult to convince a dog to eat enough of them to be poisoned. These plants cause a Heinz body anaemia by inducing oxidative damage to the surface of the red blood cells, and for some reason breeds of Japanese origin like the Akita and Shiba Inu seem particularly prone to this toxicity.

It usually takes 10 to 15g per kg of body weight to poison a dog, but those breeds can be affected by as little as 5g per kilo. So for a big, 35kg dog, that’s about three medium sized onions.

Poisoning can happen all in one go, or it can happen by eating small amounts over a longer period of time, which is why it’s infuriating to see garlic being suggested as a natural remedy for things.

Bad cases will have to be treated with a blood transfusion as there is no direct antidote. And for interest, there are other things that can cause Heinz body anaemia too, like zinc.

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