and uncommonly from hypocalcemia or hypoglycemia), and by fetal factors such as oversize fetuses (commonly with small litters and brachycephalic breeds), congenital disorders (e.g monster puppies and hydrocephalus), fetal malpositioning and dead fetuses. | and uncommonly from hypocalcemia or hypoglycemia), and by fetal factors such as oversize fetuses (commonly with small litters and brachycephalic breeds), congenital disorders (e.g monster puppies and hydrocephalus), fetal malpositioning and dead fetuses. |