BioSafe(TM) Watermelon Dog Toy Germ smart dog toy. BioCote protected. A more hygienic toy for your pet and your family. BioCote is an antimicrobial technology. An antimicrobial is something which prevents the growth and survival of microbes including bacteria, mold and fungi. Lower levels of bacteria means improved hygiene, reductions in staining and odors and premature degradation of materials.