After grooming pets for over ten years, I've yet to find a good use for pin brushes when it comes to dog or cat coats. I love this brand of grooming products, but pin brushes are better left for human hair use. Other types of brushes work way better for whatever need you have from removing undercoat to detangling. If you use these on long hair the pins tend to make tangles and mats even worse since theycan so easily get caught right in the middle of a mat. Stick with slickers, combs and undercoat rakes and yyou'll be set!