LR Calsiherb is a calcium supplement for animals which is unique as it contains calcium from two sources. This product contains Rock calcium as well as calcium from phytochemical ingredients. This dual sourcing formula increases its effectivity in animals. Being the natural sources of calcium, calcium in LR Calsiherb can pass various barriers in the animal body including placenta. LR Calsiherb can pass the placental barrier and provide calcium directly to the foetus.