Zoo Med Excavator Clay Burrowing Reptile SubstrateZoo Med Excavator Burrowing Clay allows reptiles to dig tunnels and burrows just like they do in nature. You can also mold and create multi level terraces and burrows in your reptiles terrarium. Excavator holds its shape, allowing critters to create burrows and tunnels that won't collapse. Watch your reptiles perform natural digging behaviors Make your reptiles feel "at home" in their natural habitat All natural with no dyes, artificial colors, or