Feeding your dog some grain free dog food is not dangerous and the dog food even when grain free is not harmful to your dog.
But in some dogs the grain free dog may lead to heart disease and other health issues due to the lack of grain in the dogs diet.
If you do feed the dog some grain free dog food you should also make sure to feed them some dog food that contains grain and feed them other foods as well.
Feeding the dog some cooked rice and chicken can help keep the dog healthy when you feed them grain free dog food.
However it's best to keep the dog on a grain fed dog food diet and buy dog food that includes the grain in the dog food.
Dogs that have been fed an only grain free dog food diet have a higher risk of developing heart disease than dogs that are fed dog foods with grain in them.
Grain is important for dogs health so when they do completely without grain they can have health issues.