100% garlic is used to make garlic powder.
When we know how much garlic is used in garlic powder we can determine whether it is toxic for our dogs or not.
If you did not do some research on the topic garlic powder might also have contained other ingredients.
By having to do the result I do not know if I look foolish or merely extremely cautious!
Garlic is peeled dried (or heated) sliced ground or minced until its particles are the right size.