Why timing matters after 45 minutes
Since it's been three-quarters of an hour since ingestion, solanine from any plant material would already be absorbing into your Shih Tzu's system. Inducing vomiting now risks pushing toxins further without preventing absorption. The sauce residue likely contained minimal leaf matter, but basil stems could also carry related compounds.
Check your dog's gums—if they appear brighter red than usual, circulation might be reacting to irritants. A normal pink color suggests limited exposure so far. Time any vomiting episodes—spacing closer than twenty minutes apart warrants a vet call.
The specific risk for small, flat-faced breeds
Your 8 kg Shih Tzu's compact airway makes vomiting more dangerous than for longer-nosed dogs. Never induce vomiting in brachycephalic breeds without veterinary supervision—they can aspirate easily. Focus instead on identifying whether the sauce contained visible herb stems or leaf flecks when originally served.
Notice if your dog is breathing through their mouth more than usual—this could signal nausea in short-faced breeds that don't always vomit obviously. Their smaller liver size also processes toxins slightly slower, extending the observation period needed.
Signs the sauce contained more than tomatoes
Inspect the plate under a light for adhered green specks—basil stems often resemble tomato leaf fragments. Both contain similar irritants. If the sauce was homemade, recall whether you removed whole herb stems before serving. Restaurant sauces frequently blend everything, increasing plant matter in residues.
Watch for unusual face-rubbing against furniture—dogs sometimes do this when their mouths tingle from mild toxins. Check between their toes for saliva residue; excessive paw-licking can indicate mouth discomfort when vomiting hasn't occurred.
Hydration strategies for the next 12 hours
Offer lukewarm bone broth (no onions) in a shallow bowl—the warmth helps relax the stomach while replacing fluids. Avoid cold water, which can trigger spasms in an irritated digestive tract. Add a teaspoon of plain pumpkin puree to their next meal to soothe the gut lining.
Monitor urine output—if your dog doesn't produce at least two normal puddles in the next eight hours, dehydration could be developing despite apparent stability. Keep them indoors in a cool area—solanine sometimes causes mild fever that increases fluid needs.
The full verdict, portion guidance and serving notes are collected on the Tomato leaves & stems food facts page.