Ditto S-B was not a carpet but a filtering cloth. A 100% cotton felt cloth that was used to filter the water etc. used in the pulp paper making process. That was many years ago so may not be available like it use to be. Middleton worked for Sonoco and got me a bunch of it. If having to use carpet make sure like was mentioned. Do not use any types that will snag on the dog's toe nails.

Remember to cut the sharp ends off the toe nails when using a round table or a Slat Mill. Cheers