The best dog food can be seen in food stores and veterinary practices.
If the ends are frayed and loose, though, the carpeting doesn't always have a high twist lvl. The width is measured in 'Microns' (micrometres) which equals one thousandth of a millimetre (mm). https://www.Youtube.com/channel/UCjyhcw5VrWyXxESFF_8UNBA