Please read the following article and consider getting one of these type balls right away. Griffons are impacted by this condition occasionally and for the most part if you will simply play ball with them, no further actions occur. Occasionally they will need baby teeth removed. Canine dentists are happy to suggest some really expensive options. Please use the ball. http://www.toothvet.ca/PDFfiles/ball_therapy.pdf
We cannot see or identify this issue as their teeth are too small.