The brown bear (Ursus arctos) hibernates for 5 to 6 months each winter and during this time ingests no food or water and remains anuric and inactive. Despite these extreme conditions. bears do not develop azotemia and preserve their muscle and bone strength. To date most renal studies have been limited to small numbers of bears. https://www.foldlyers.shop/product-category/mains-power-adaptor/