If you could check that would be great.
While it is long enough that I am not concerned about toxicity however from her actions we know that her abdomen is obviously painful.
At this point my concerns would be
1. Some of the wrappers have caused a blockage. In these cases we can see painful abdomen, trouble/staining to pass stool or loose stool.
2. Pancreatitis. Because of the high fat content in the chocolate this can result in pancreatitis. Left untreated it can start to shut down other organs such as the liver as well as cause permanent damage to the pancreas and even death.
Knowing that she passed stool last night is a good sign but we still need to keep an eye on her.
To help settle the stomach you can try Pepcid AC at a dose of 0.25mgs per pound of body weight and Gas X. A dog her size can take an adult dose of the Gas X. I would give the Gas X first wait 30 minutes and give the Pepcid.
Also keep an eye out for any bloating of the abdomen. If the abdomen becomes larger then normal, is hard, or she tries to vomit without producing anything this could indicate bloat. This would be an emergency as bloat can result in death in less then 2 hours.
If she shows any signs of bloat or the medications I suggested above do not seem to help I would have her seen today at your local ER.
One other thing I want to throw in her is that if she is not spayed and is 4-8 weeks out of her last heat then she would be at risk for a uterine infection called a pyometra.
Hopefully the medications will work and she will feel better soon.
Please reply back if you have additional questions and I will be happy to continue. If you have no additional questions please take a few moments to provide a rating so that I am compensated by justanswer for assisting you today.