Why mould changes everything for your 7 kg dog
That piece of coconut wasn't just stale — the visible mould means it was producing mycotoxins, which attack a small dog's system much faster than plain spoiled food would. Your Shih Tzu's size makes him especially vulnerable to both the neurological effects of these toxins and the high fat content in coconut flesh. What might cause mild stomach upset in a larger dog could trigger tremors or worse here.
Since he ate it within the past few hours, the mycotoxins are already absorbing. Don't wait for symptoms to appear before calling your vet, especially if you notice him licking his lips repeatedly or acting disoriented. The combination of mould toxins and coconut fat means this isn't a "wait and see" situation.
The next twelve hours with mould exposure
Mycotoxins work quietly at first — your dog might seem fine for several hours before showing signs. Watch for subtle changes like restlessness, excessive drooling, or stumbling when he walks. These can escalate to full-body tremors or seizures if the toxins affect his nervous system. The fat from the coconut could also cause painful pancreatitis within a day.
Collect any remaining mouldy coconut in a baggie to show the vet, since identifying the mould type helps guide treatment. If he starts vomiting or has diarrhea with a strange odor (almost chemical-like), skip monitoring and go straight to emergency care — that's his body losing the battle against the toxins.
Why Shih Tzus need faster action
Small breeds like yours process fats and toxins more slowly, letting problems build up. A 7 kg dog eating mouldy coconut is like a child eating a whole contaminated loaf — his liver can't filter the assault as efficiently as a bigger dog's could. The rounded face shape of Shih Tzus also makes them prone to breathing difficulties if neurological symptoms cause throat muscle spasms.
Even if he seems stable now, call your vet within the next two hours to discuss whether he needs detox support. They may recommend bringing him in for fluids to help flush his system before symptoms hit full force. This is one case where being proactive with a small dog prevents a much scarier midnight emergency.
Longer-term risks beyond tonight
If he weathers the initial toxin attack without major symptoms, watch his appetite and energy for the next three days. Mycotoxins can sometimes cause delayed liver inflammation that shows up as yellow gums or dark urine. The coconut's fat might also trigger a mild pancreatitis episode days later, signaled by a hunched back or reluctance to move.
For the next month, be extra cautious with any fatty foods — his system will be primed for inflammation. One mouldy coconut incident can sometimes make a small dog sensitive to rich foods they previously tolerated. Keep plain pumpkin puree on hand in case his digestion stays shaky.
The full verdict, portion guidance and serving notes are collected on the Coconut food facts page.