trim dog toe nails or not

One thing I have noticed over the years. The real tight footed dogs very rarely ever need their toe nails clipped where flatter footed dogs seem to grow longer toenails. After hunting for a week in Canada, all my dogs nails will be worn almost to the quick running on rocks. Hunting on drier, sandy soil or rocks seems to keep them down. Hunting them in the marsh does not wear them down at all. Some women can grow long fingernails & some cannot. Same with dogs. I have always liked the darker pads & toenails on dogs but have had some Plotts with lighter toenails & it never seemed to affect them.