DENTALFIT PETS Ultra-Fine Bristle Toothbrush for Small Dogs & Cats - 1 Piece Oral Care for Family Pets Soft and fluffy ultra-fine bristles gently and firmly fit the different sizes of teeth and delicate gums of dogs and cats! For preventing periodontal problems in dogs and cats, whose plaque easily turns into tartar. *Uses PBT bristles (polybutylene terephthalate) Plaque in dogs and cats turns into tartar in 3-5 days, causing periodontal disease. Brush their teeth regularly and carefully. Also, since the bristles don't hurt the gums, brushing and massaging the gums at the same time promotes blood circulation.