Can pets eat xylitol and birch sugar?
If this has already been eaten, ring your vet or an animal poison control line now rather than waiting for signs to appear — for several of these the window in which treatment works closes before the animal looks unwell. Do not try to make the animal sick at home: home emetics are dangerous for corrosive and petroleum substances and for an animal already showing signs, and salt-based ones have themselves proved fatal.
By animal
| Animal | Verdict | Why |
|---|---|---|
| Dogs | Toxic | Triggers a massive insulin release, then hypoglycaemia, and at higher doses liver failure. |
| Cats | Risky | Cats appear far less sensitive, but there is little data and no reason to test it. |
What it actually does
In a dog, xylitol is mistaken for glucose by the pancreas and provokes an insulin release several times larger than actual sugar would. Blood glucose crashes within 10 to 60 minutes, producing weakness, staggering and seizures. At higher doses it causes acute liver necrosis, which can appear a day or more later in a dog that seemed to recover. It is in sugar-free gum, mints, some peanut butters, protein bars, toothpaste, some medications and increasingly in "no added sugar" baking products, often labelled as birch sugar or E967.
How much matters
Around 0.1 g/kg is enough to cause hypoglycaemia and 0.5 g/kg to threaten the liver. A single piece of sugar-free gum can contain 0.3 g or more, so two pieces are a real dose for a small dog.
The bit that is usually got wrong
Check the peanut butter jar before using it for medication or a lick mat. Xylitol-sweetened peanut butter exists and is the single most common route of accidental poisoning.
Body weight decides almost everything here, so what is trivial for a 40 kg dog can matter for a 4 kg one, and a bird is smaller again. Where a real published threshold exists this page gives it; where none does, it says so rather than inventing one.
Sweets and baking
| Food | Worst verdict | Dogs | Cats |
|---|---|---|---|
| Chocolate | Toxic | Toxic | Toxic |
| Chewing gum | Toxic | Toxic | Risky |
| Ice cream | Risky | Risky | Risky |
| Honey | Risky | In moderation | In moderation |
| Nutmeg | Not safe | Not safe | Not safe |
| Cinnamon | Risky | In moderation | Risky |
Common questions
- Can dogs eat xylitol and birch sugar?
- Toxic — treat as an emergency. Triggers a massive insulin release, then hypoglycaemia, and at higher doses liver failure.
- Can cats eat xylitol and birch sugar?
- Risky — depends on amount or preparation. Cats appear far less sensitive, but there is little data and no reason to test it.
- What does xylitol and birch sugar actually do?
- In a dog, xylitol is mistaken for glucose by the pancreas and provokes an insulin release several times larger than actual sugar would. Blood glucose crashes within 10 to 60 minutes, producing weakness, staggering and seizures. At higher doses it causes acute liver necrosis, which can appear a day or more later in a dog that seemed to recover. It is in sugar-free gum, mints, some peanut butters, protein bars, toothpaste, some medications and increasingly in "no added sugar" baking products, often labelled as birch sugar or E967.
- How much is dangerous?
- Around 0.1 g/kg is enough to cause hypoglycaemia and 0.5 g/kg to threaten the liver. A single piece of sugar-free gum can contain 0.3 g or more, so two pieces are a real dose for a small dog.
- What should I do if my pet has eaten it?
- Call your vet or an animal poison control line now, rather than waiting for signs. Do not try to make the animal sick at home.
Related pages
- Can pets eat chocolate? Toxic — treat as an emergency
- Can pets eat chewing gum? Toxic — treat as an emergency
- Can pets eat ice cream? Risky — depends on amount or preparation
- Can pets eat honey? Risky — depends on amount or preparation
- Can pets eat nutmeg? Not safe
- Can pets eat cinnamon? Risky — depends on amount or preparation
- Can pets eat chocolate? Also an emergency
- Can pets eat grapes, raisins, sultanas and currants? Also an emergency
- Can pets eat onion, garlic, leek and chives? Also an emergency
- Can pets eat cooked bones? Also an emergency
- Everything, for dogs 46 foods
- Everything, for cats 46 foods
Sources
- MSD/Merck Veterinary Manual — Merck & Co.