Chocolate contains a chemical called theobromine which is very toxic to dogs. They may vomit, start to tremble and become hyperactive. Their heart starts beating very quickly and in severe cases seizures and death can occur.
Recently, there have been health warnings about cocoa bark matting and cocoa shells which are sometimes used as ornamental garden mulch – some dogs that have eaten these due to their attractive smell have suffered theobromine poisoning as a result.
Rodenticide / rat bait