STOP! You should never try to feed dijon mustard or any type of mustard to dogs as it is toxic for them to eat.
Mustard seeds are known to be toxic to dogs and therefore any type of mustard will be bad and toxic to a dog.
Therefore you should not try to feed dijon mustard to your dog. You should not try and feed regular or spicy mustard to your dog as well.
There are many other types of foods that are safe for your dog to eat and therefore it is best to just avoid this condiment altogether.
If you have more questions about this food make sure you speak with your local pet shop or your vet for more details to find out why mustard seeds are so toxic for your dog.