Q. My eight pound dog ate a little less than an ounce of chocolate what do I do
A. If it was milk chocolate, monitor for GI upset or shaking. Seek veterinary attention if you see tremors, seizures, hyperactivity or increased heart rate. If it was dark chocolate, seek veterinary attention immediately from your vet or a local veterinary ER. Your dog will be made to vomit then likely given activated charcoal and possibly placed on IV fluids and monitored for 24 hours.
Use the link below for future reference.