A common question about cats is whether they are allergic to chocolate. The SlideShare presentation explains the reasons why chocolate cannot be given to cats. What are the chemicals in chocolate that are bad for cats? What are the symptoms of chocolate poisoning in cats? By Eric Troy at CatCurious. Image credits: Slide 4 Dark chocolate and milk chocolate © Birgit Brandlhuber Slide 5 cartoon cat holding dynamite © maxiharmony All others public domain.