Seasoned mother---healthy birth---cria up and about within an hour---nursing apparently going well--cria appeared healthy and active---on 4th day, 3 pound weight loss noted (from 21 down to 18 pounds)---started some supplemental feeding of milk and yogurt by bottle, but cria appeared to still be nursing well---gave a feeding at 8 am on 7th day---at noon, cria found dead in the barn in the corner where she usually lay down---no apparent trauma no necropsy done any thoughts?