Why vomiting changes the urgency level
When a dog starts vomiting after chocolate ingestion, it means theobromine has already entered the bloodstream and is triggering the brain's emetic center. This isn't productive vomiting that removes toxins—it's a neurological response to the stimulant. Your 6kg dog's small size makes half a cup a potentially critical dose, especially since vomiting began within the hour, suggesting rapid absorption.
The froth or bile in vomit matters—dark brown flecks could indicate stomach lining irritation, while undigested whipped cream suggests the chocolate was very recent. Don't attempt to measure what was expelled; focus instead on respiratory rate (normal is 10-30 breaths/minute) and whether vomit contains blood (bright red or coffee-ground texture). Both require instant emergency care.
What ER vets do first for chocolate toxicity
Upon arrival, the team will likely hook up ECG leads immediately—theobromine causes characteristic 'splintering' on readings that predicts seizure risk. Blood draws check potassium levels (elevated levels worsen heart arrhythmias) and liver enzymes. They may administer IV lipid therapy—fat droplets that bind fat-soluble theobromine molecules, pulling them from circulation faster than the liver can process.
Your dog will receive antiemetics to stop the vomiting cycle, but not sedatives unless absolutely necessary, as these can mask neurological symptoms. Expect rectal temperature checks every 30 minutes—chocolate toxicity often causes dangerous hyperthermia. The vet staff will palpate his abdomen carefully; a tense or painful belly could indicate pancreatitis from the high fat content in hot chocolate.
The 24-hour danger window explained
Peak theobromine levels hit 4-12 hours post-ingestion, so tonight is critical even if he seems stable after treatment. Hospitalization allows for continuous heart monitoring—the most common fatal complication is ventricular fibrillation, which strikes suddenly. They'll likely keep him on cool mats to counteract hyperthermia and may catheterize him to measure urine output, as kidney strain sometimes develops later.
If discharged same-day, you'll need to replicate some monitoring at home: count his resting breaths per minute (use phone timer) and check gum color every two hours. Set alarms through the night—lethargy can be deceptive; wake him gently to confirm he rouses normally. Keep other pets away to prevent stress-induced cardiac events during recovery.
Follow-up care you should insist on
Within 72 hours, request a recheck blood panel focusing on liver values and electrolytes—these often show delayed abnormalities. Discuss cardiac ultrasound if there were arrhythmias during treatment, as some dogs develop temporary valve irregularities. Your vet may recommend switching to a low-protein diet briefly to ease kidney processing while his system clears residual toxins.
Behavioral changes sometimes emerge days later—increased startle response or altered sleep patterns suggest lingering neurological effects. Track these meticulously; they usually resolve within two weeks but may warrant temporary anxiety management. Going forward, invest in pet-safe cocoa-free treats—many dogs develop a taste for chocolate after one exposure, making future incidents more likely.
The full verdict, portion guidance and serving notes are collected on the Hot chocolate food facts page.