Why three hours matters for your 7 kg dog
The delay since ingestion works in his favor—if he was going to have a severe reaction, signs usually appear within two hours. At the three-hour mark with no diarrhoea yet, he may have only gotten a minimal amount of erythritol from licking the sweetener. Smaller dogs like yours often show symptoms quicker than larger breeds, so this timing suggests a smaller exposure.
What you're watching for now isn't just diarrhoea but changes in his behavior—does he seem restless or keep licking his lips? These subtle signs often precede gut upset in dogs who've had sugar alcohols. His 7 kg body is large enough to handle minor exposures without issue, but enough erythritol could still cause loose stools starting soon.
How much he likely ingested from licking
A few licks of erythritol sweetener typically delivers less than a gram—not enough to cause severe diarrhoea in a 7 kg dog but possibly sufficient for mild gut irritation. Unlike eating a full treat, licking residue means he ingested it slowly, which may spread out any reaction over several hours rather than one intense episode.
The form matters too—powdered sweetener sticks to a dog's tongue more than liquid forms, increasing what he might have swallowed. If the sweetener was old or mixed with dust under the couch, that could dilute the erythritol concentration. Either way, his reaction at this point would be limited to gastrointestinal signs rather than systemic issues.
What to expect over the next twelve hours
If diarrhoea starts now, it will likely be mild—perhaps one or two looser stools rather than full liquid episodes. The sugar alcohol should pass through his system within 24 hours, with gut sounds returning to normal by tomorrow morning. Offer his regular meals unless he refuses them, as fasting isn't necessary for minor erythritol exposure.
Watch his water intake—some dogs drink excessively after ingesting sugar alcohols, which can ironically worsen diarrhoea by further flushing the gut. If he's lapping up water obsessively, offer small amounts every thirty minutes instead of leaving a full bowl out. His stools should gradually firm up by tomorrow if this was just erythritol-related.
When to shift from watching to acting
If no signs appear by the six-hour mark, he's likely in the clear—erythritol reactions rarely start later than that in dogs his size. What would warrant concern now isn't mild diarrhoea but signs like lethargy, vomiting, or loss of coordination, which would suggest something beyond simple sugar alcohol ingestion.
For a 7 kg dog, three vomiting episodes in an hour or diarrhoea that looks like pure liquid would mean calling your vet. Otherwise, just keep him comfortable, note how many times he needs to go outside, and have his favorite toys ready to distract him if his gut seems unsettled. The couch residue shouldn't cause lasting issues.
The full verdict, portion guidance and serving notes are collected on the Erythritol food facts page.