Dogs can have Nilla wafers in moderation.
Although Nilla wafers have no nutritional value to your dog and Nilla wafers also contain high amounts of sugar and fat which can be harmful to your dog in excess.
The Nilla wafers can potentially cause gastrointestinal upset and vomiting if your dog eats too many of the Nilla Wafers.
The Nilla wafers and Vanilla wafers are not toxic to dogs but they should only be given Nilla wafers or Vanilla wafers in moderation and as a treat.
A dog that eats vanilla wafers or Nilla wafers could get an upset stomach and gastrointestinal upset, which includes vomiting, diarrhea or lethargy.
My dog eats Nilla wafers and Vanilla wafers as a treat and he loves them and has been eating them with me for 3 years now with no issue.