What the first vomit tells us about his reaction
That single vomiting episode four hours ago suggests his stomach rejected the unusual bulk of dried herbs. At 12 kg, his system isn't built to process large amounts of fibrous plant material. The oregano likely caused mechanical irritation rather than chemical toxicity—imagine swallowing a handful of scratchy leaves whole.
Since the vomiting happened relatively soon after ingestion, it removed much of the problematic material. This reduces the chance of ongoing absorption of any irritating compounds. Your prompt vet visit was the right call to assess for dehydration or need for supportive care.
The critical 12-hour window post-vomiting
Most recurrence of symptoms happens within half a day after the initial incident. Set up a quiet resting area where you can observe him easily. Offer ice cubes or small licks of water every 30 minutes—this prevents gulping too much at once which could trigger more vomiting.
His gums should stay moist and pink; if they feel tacky or pale, that signals dehydration needing vet attention. Note any abdominal tensing or repeated swallowing motions—these can precede another vomiting episode. Normal energy levels and interest in surroundings are good signs he's recovering well.
Transitioning back to regular meals safely
After 6-8 hours with no further vomiting, introduce a bland diet in tablespoon portions. Boiled white rice with a bit of lean protein helps reset his digestion. Avoid adding oils or seasonings—this isn't the time to test his stomach's resilience.
If he keeps this down for two meals, gradually mix in his regular food over the next day. Sudden returns to rich diets can cause rebound digestive upset. Watch stool consistency closely; some loose bowels are common after gastrointestinal irritation but should firm up within 48 hours.
When to sound the alarm post-monitoring
Though unlikely after this timeframe, watch for delayed symptoms like excessive drooling or abdominal distension. These could indicate an uncommon intestinal blockage from the fibrous herb mass—more a risk with whole leaves than powdered oregano, but worth noting.
Mark your calendar for exactly 24 hours after the vet visit. If all remains normal by then, you can relax your watch. But save a sample of his next bowel movement to check for undigested herb particles—their presence confirms his system has cleared the irritant completely.
The full verdict, portion guidance and serving notes are collected on the Oregano food facts page.