It is not safe to feed soybeans to dogs. Dogs cannot digest soybeans because they lack the necessary amino acids. Soybeans could cause bloating which can even lead to death.

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Resource:

  1. Why are Grapes Bad for Dogs? – http://answers.ask.com/Food_and_Drinks/Food_and_Cooking/why_are_grapes_bad_for_dogs
  2. Why is Chocolate Bad for Dogs? – http://answers.ask.com/Science/Nature/why_is_chocolate_bad_for_dogs
  3. What Foods are Bad for Dogs? – http://answers.ask.com/Food_and_Drinks/Other/what_foods_are_bad_for_dogs
  4. Why are Onions Bad for Dogs? – http://answers.ask.com/Science/Nature/why_are_onions_bad_for_dogs