Experienced and professional animal trainer provide their insights in answering this question :
A. Well at least she’s vomiting! Hopefully she gets all of it out! I also need to know how much chocolate the dog ate in order to know how serious it is. Chances are it’s serious if the dog is vomiting on their own. Take the dog to the vet to be safe.

How to Identify Common Pet Problems ?

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Clinical signs depend on the amount and type of chocolate ingested. For many dogs, the most common clinical signs are vomiting, diarrhea, increased thirst, panting or restlessness, excessive urination, and racing heart rate. In severe cases, symptoms can include muscle tremors, seizures, and heart failure.
In addition to this, the very slow deactivation of theobromine by dogs means that the effects of chocolate poisoning can be very prolonged – up to three days, so your dog may need to be hospitalised for all this time.
While dogs reach peak serum (the non-cell part of blood) levels of caffeine after 30-60 minutes and eliminate half of an ingested dose in 4.5 hours, they don`t reach peak serum levels of theobromine until after 10 hours and take 17.5 hours to eliminate half of it.
Threat to pets

Ingestions of more than 0.13 ounces per pound of dark or semi-sweet chocolate may cause poisoning.

All kinds of milk and dark chocolates contain methylxanthine (like theobromine). This chemical is poisonous to pets if ingested, and results in vomiting, diarrhea, hyperactivity, inflammation of the pancreas (i.e., pancreatitis), an abnormal heart rhythm, seizures, and in rare cases, death.
Overconsumption: Consuming large amounts of chocolate can lead to feelings of discomfort, bloating, or nausea. The high sugar and fat content in chocolate can be difficult for your digestive system to process, especially in excessive amounts.
Affected dogs show signs 30 minutes to 4 hours after ingesting the poison. Initially affected dogs become anxious and have an elevated body temperature. Panting is usually seen. Progressively they become worse and staggery.
How is chocolate poisoning in dogs treated? Treatment for chocolate poisoning in dogs may include induced vomiting, activated charcoal, intravenous fluids, heart medications, anti-convulsants, and antacids, depending on the clinical signs.
A new study has found that dark chocolate is easier to digest than other types of chocolate. The study, published in the Journal of Food Science, found that dark chocolate is more slowly absorbed by the body and doesn`t cause as much of an increase in blood sugar levels as other types of chocolate.
The toxic dose for theobromine is reported as 100-150mg per kg body weight, however occasionally problems are observed at doses as low as 20mg/kg. What this means in a practical sense, using 100mg/kg as a guide this equates to: approximately 60 grams of milk chocolate per kg bodyweight.
A small amount of chocolate will probably only give your dog an upset stomach with vomiting or diarrhoea. Treatment is required for dogs who have eaten 3.5g of dark chocolate for every kilogram they weigh and 14g of milk chocolate for every kilogram they weigh.
As a rule, try fasting your dog for 24 hours when they start vomiting—offer water, but no food. If they continue to vomit during that period of time, they need to have a veterinary exam. If the dog doesn`t vomit in those 24 hours, but then begins to vomit again after the 24-hour fast, they need to see a veterinarian.
Just like humans, dogs can also develop food poisoning. In many cases, it can be mild and your pet can recover within a few days.
The dark chocolate side effects may be associated with caffeine. It may cause sleeplessness, nervousness, increased urination, fast heartbeat, skin allergies, migraine and headache, nausea, and stomach problems like gas and constipation.
What is the daily recommended amount of dark chocolate? The recommended “dose” is approximately 1 to 2 ounces or 30-60g, experts say. Indulge in anything more than that, and you may be consuming too many calories. A 1.45-ounce (41 gram) Hershey`s Special Dark Chocolate Bar has 190 calories.
In severe poisoning cases or cases where treatment was delayed the chance of recovery is extremely low. When pets do recover from severe poisoning there can also be long-term damage to their overall health.
Common Signs of Dog Poisoning

The following may be signs of dog poisoning: Diarrhea or blood in the stool (either bright red blood or dark black tarry stools) Vomiting or loss of appetite. Seizures or tremors.

If you`re a fan of dark chocolate, you may be surprised to learn that it can irritate your colon. While the occasional piece of dark chocolate is unlikely to cause any problems, eating too much of it can lead to abdominal pain, diarrhea, and other gastrointestinal issues.
Chocolate contains four main ingredients that can irritate your gut, including sucrose, lactose, caffeine, and fats. To help you avoid a potential flare-up, remember to enjoy chocolate in moderation: stick to small servings and choose dark chocolate options where possible.
Humans can easily digest and excrete methylxanthines, the half life of theobromine being 2-3 hours. However absorption in dogs is slow, with metabolism in the liver and extrahepatic recirculation before excretion in the urine. The half life of theobromine in dogs is about 18 hours.
How much chocolate can I eat a day? Experts say the recommended “dose” is approximately 1 to 2 ounces or 30-60g. Indulge in anything more than that, and you may be consuming too many calories. A 1.45-ounce (41 gram) Hershey`s Special Dark Chocolate Bar has 190 calories.
Symptoms of dog chocolate poisoning include vomiting (which may include blood), diarrhoea, restlessness and hyperactivity, rapid breathing, muscle tension, incoordination, increased heart rate and seizures.
Approximately 150g of dark chocolate is toxic to a 10kg dog.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. My 25 lb pug ate dark cho m and m now she is vomiting
ANSWER : A. Well at least she’s vomiting! Hopefully she gets all of it out! I also need to know how much chocolate the dog ate in order to know how serious it is. Chances are it’s serious if the dog is vomiting on their own. Take the dog to the vet to be safe.

Q. My dog has been throwing up a clear liquid (a little slimey) but otherwise acts fine. Could something be wrong?
ANSWER : A. How long has he been doing this? Ongoing vomiting (>2 weeks) warrants a vet visit, but if it’s a one-off, or happens very infrequently then it could be due to something he ate disagreeing with him. Is he is bright, alert and happy in himself I would monitor him, start keeping a vomit journal (seriously) of when he vomits, how much, what the vomit was like, what he was doing before and any other notes. This will be really useful for your vet if it requires further investigatoon. You can also try bland food – boiled chicken and white rice – in small amounts on his vomit days to give his tummy a rest. Withhold for 8h after a vomit and reintroduce the bland diet in small, frequent meals.

Q. Should I be concerned if my cat ate a drop of habanero hot sauce?
ANSWER : A. If it was just a drop your cat will likely be fine. It is surprising that she tried it at all, as most pets do not like the taste of spicy flavored foods and it is actually used as a deterrent in training!

If your cat ate a larger amount, she may experience some digestive upset such as vomiting or diarrhea. A bland diet of plain boiled chicken can help soothe an upset stomach before returning to her regular food.

However, if the vomiting continues for more than a day, or she shows signs of illness such as confusion, disorientation or shaking, it may be that she either ate something else potentially toxic, or ate too much of the sauce and is experiencing adverse effects. These symptoms should be brought to the attention of your local vet or emergency clinic for care.

Read Full Q/A … : Blackberry Habanero Jelly

Q. What should I do if my dog ate too much. She got into the food and helped herself
ANSWER : A. Depending on the size of dog, volume and consistency of food and time since she ate it, inducing vomiting is sometimes recommended but if she is comfortable and willing and able to drink water without vomiting she will likely pass excess ok. Some diarrhea and mild vomiting of food may be expected for 24-48hours. Profuse vomiting, especially if more water than food, discomfort and restlessness would indicate that veterinary treatment is required

Q. My dog ate 2 candy bars, a Snickers and M&Ms. Is this toxic? He is a 13.4 lbs Chorckie. He drank water and ate some carrots too
ANSWER : A. Chocolate is toxic to dogs. Dark chocolate is usually more harmful than milk chocolate products, as the cocoa content (which is the toxic part) is higher, however any chocolate product if eaten in a high enough amount can be harmful.

It is best to contact your local veterinarian or emergency clinic for care if your dog has ingested chocolate. If the ingestion was recent, your vet may recommend inducing vomiting and can give you instructions unique to your dog for care. If the ingestion was not recent, your vet may recommend bringing your dog in for care, or monitoring for signs of toxicity such as vomiting, diarrhea, lethargy, abdominal pain or changes in behavior or appetite.

Q. Great Dane, Lab mix is vomiting, lethargic, bloodshot droopy eyes. No appetite. What’s wrong?
ANSWER : A. Vomiting is a common symptom of many illnesses which can range anywhere from minor digestive upset, to mores serious problems such as disease, illness or even bloat.

If your Dane Mix has only vomited once or twice, it may just indicate a minor stomach upset. Picking up food for a few hours then feeding a bland meal of boiled chicken and plain rice can help soothe the stomach and entice eating. However, if the vomiting continues or symptoms persist for more than a day, it may indicate something more serious going on and should be looked at by your vet.

Large and giant breed dogs are more prone to a condition called Bloat, which is considered a medical emergency. Signs of bloat in a dog include a large distended abdomen, pain in the abdomen, signs of distress such as heavy panting, pale gums or tongue, vomiting and diarrhea, or attempting to vomit or defecate without success. If you suspect your dog may be experiencing bloat, contacting your vet or emergency clinic immediately is best.

Q. My dog ate individually wrapped cookies including the plastic. He is acting normal. Should I take him in or just monitor for now
ANSWER : A. It really depends how many cookies and wraps he ate, if he ate a lot and these cookies contained chocolate as well, i would strongly advise taking him to the vet in order for him to get an injection that will induce vomiting immediately.

If he only ate a couple, without any chocolate in it, i would advise monitoring his appetite, vomiting and diarrhea (it could be normal if has those 1-2 times but not more). if he doesn’t seem himself take him to the vet, otherwise the plastic papers will probably pass in the poo.

Q. He is not eating or drinking seems like he has no energy and vomiting and seems like he weak
ANSWER : A. Causes of not eating and vomiting can be many. Gastrointestinal infection, caused by bacteria (salmonella, for example) or viruses or parasites (although parasite infections tend to be more mild, but giardia can make them feel pretty bad) can be a cause. Eating something he shouldn’t have, like the trash or rotten food can cause it. Intestinal obstruction can cause vomiting as well. Other causes (non-GI) of vomiting include kidney failure (can be due to many things, such as toxins, kidney stones, cancer) or liver diseases or liver failure.

The vomiting is concerning, however the weakness and lack of energy implies that he’s either seriously dehydrated or there’s a lot more going on than just s simple case of vomiting. He needs to see a vet and have testing, likely to include x-rays and/or blood work, to see what’s going on, so that it can be treated.