The first 2 hours after ingestion in a 10 kg dog
By now, caffeine from those 5 espresso beans is fully in your dog's bloodstream. The clock started ticking the moment they were swallowed, and peak effects usually hit between 1-3 hours. Since it's been 2 hours, you're right in the danger window where symptoms escalate from mild restlessness to serious neurological signs. Check their gums — if they're bright red instead of pink, that's a warning the heart is working too hard.
At this dose, expect symptoms to stack: first comes pacing or whining as their body tries to process the stimulant. Next comes vomiting (which doesn't remove much caffeine now), followed by muscle tremors that start in the face and spread to the legs. If they're panting nonstop even while resting, their body is struggling to manage the metabolic overload.
Why timing matters more than the bean count
Five beans might sound insignificant, but espresso beans pack concentrated caffeine — roughly the equivalent of half a cup of brewed coffee for a 10 kg dog. The real concern isn't just the amount, but that two hours have passed without intervention. Caffeine's effects last 6-12 hours in dogs, so even if symptoms seem mild now, they can worsen suddenly.
Watch for a 'second wave' of symptoms around the 4-hour mark: stumbling like they're drunk, dilated pupils that don't respond to light, or involuntary twitching. These signal the nervous system is under extreme stress. Small dogs often show these signs sooner than larger breeds because their bodies can't distribute the toxin as effectively.
Emergency signs that need immediate vet care
Seizures are the critical red flag here — they typically start as localized face twitches before becoming full-body convulsions. If your dog's limbs stiffen or they collapse, don't wait for it to 'pass.' Caffeine-induced seizures can cause deadly spikes in body temperature, especially in compact dogs like yours where heat builds quickly.
Less obvious but equally urgent is an irregular heartbeat. Place your hand flat against their left chest behind the elbow; a normal rhythm feels like steady drumbeats. If it's erratic (fast-slow-fast) or you can't distinguish individual beats because they're racing, their heart muscle is overstimulated. Both scenarios require IV medications only a vet can administer.
What to do while preparing for the vet
Gather the coffee bean packaging immediately — the exact caffeine content per bean determines treatment urgency. While calling the clinic, move your dog to a cool, dimly lit room without stairs or sharp objects. Overexertion worsens caffeine's effects, so prevent running or frantic movement even if they seem energetic.
Offer small laps of water every 10 minutes unless they're vomiting, but skip food (it delays vet interventions). Note every symptom's start time and duration; videos help the vet assess severity. Never induce vomiting at this stage — aspiration risk is high once caffeine affects coordination. Wrap them in a towel if tremors start; restraint can reduce injury but avoid tight pressure around the chest.
For a dose worked out against your pet's weight, use the Caffeine Toxicity Calculator.