Why vomiting at 45 minutes is actually expected
The timeline suggests your Yorkie's system is reacting normally to the sap's irritants—most dogs vomit between 30-90 minutes after ingestion as their stomach tries to expel the offending substance. At 3 kg, her small stomach volume means even a little irritation can trigger this reflex. What matters now is whether the vomiting continues beyond three episodes in an hour.
Her tiny size doesn't increase toxicity risk per se, but it does make dehydration from repeated vomiting a bigger concern than for larger dogs. Offer teaspoonfuls of water every 15 minutes rather than free access to bowls—this reduces the chance of triggering more vomiting while keeping her hydrated.
The mouth-check you need to do now
Small breeds often get worse oral irritation because their mouths have more surface area relative to body size. Gently lift her lips to check for redness or small ulcers along the gumline—these make dogs paw at their faces or rub their muzzles on carpets. A baking soda rinse (1 tsp in 1 cup water) can soothe these spots if she'll tolerate it.
Yorkies' long coats risk secondary exposure when sap transfers from mouth to fur during face-rubbing. Part the fur around her mouth and chin to check for sticky residues that could prolong irritation. Use a damp cloth with mild soap (like Dawn) to remove any sap—avoid alcohol-based cleaners that sting irritated skin.
How to interpret her energy levels
After vomiting, it's normal for small dogs to rest briefly, but she should return to baseline energy within two hours. Concerning signs would be continued lethargy, refusal to move from one spot, or ignoring high-value treats. At 3 kg, blood sugar dips can complicate recovery—offer a dab of honey on your finger if she seems weak but not vomiting.
Watch her breathing pattern too—rapid shallow breaths in a tiny dog can indicate nausea or pain rather than respiratory distress. If she's settled but still doing occasional lip-smacking or swallowing motions, those suggest residual mouth irritation rather than ongoing stomach upset.
The 4-hour mark that changes everything
Poinsettia reactions don't typically worsen after four hours post-ingestion. If she's kept water down, had no further vomiting, and shows interest in food by this point, you're past the danger zone. For a dog her size, waiting longer risks dehydration—if she can't keep water down by hour four, it's vet time.
Remember that holiday stressors (guests, noise) can amplify a small dog's symptoms. Create a quiet recovery space away from chaos. One bite rarely causes issues beyond 24 hours, but save your vet's after-hours number just in case—Yorkies sometimes rebound quickly only to relapse when stomach acids irritate already-sensitive tissues.
The step-by-step response, from the first minute to the vet visit, is in our Poinsettia emergency guide.