Yes, it is true that chocolate can be harmful and even deadly to dogs. Chocolate contains a substance called theobromine, which dogs cannot metabolize as efficiently as humans. When dogs consume chocolate, theobromine can build up to toxic levels in their bodies and cause a variety of symptoms including vomiting, diarrhea, agitation, hyperactivity, rapid heart rate, tremors, seizures, and even death.
The amount of theobromine present in chocolate varies depending on the type of chocolate. Dark chocolate and baking chocolate contain the highest amounts of theobromine, while milk chocolate and white chocolate contain less. As a general rule of thumb, the higher the cocoa content of the chocolate, the more dangerous it is for dogs.
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