Do you recommend trimming the fur under my dog’s paw when applying ToeGrips?

Yes, trimming any long hair around your dog’s pads/toes is helpful to reduce a dog’s slipping with or without ToeGrips.

If the ToeGrips contact the hair before they contact the floor, the hair will act like a “slipper”, preventing the ToeGrip from gripping the floor. It may be safest to have a groomer do this for you, so that you don’t accidentally cut your dog.