How should I record my business transactions? Purchases, sales, payroll, and other transactions you have in your business generate supporting documents. These documents contain information you need to record in your books. What is the burden of proof? The responsibility to substantiate entries, deductions, and statements made on your tax returns is known as the burden of proof.
Mice will probably open their eyes when they're about 10-14 days  old. About the time the hair is fully covering them they open their  eyes.
Credit: Nikchick CC-BY-2.0. Rabbits prefer to have their young in a nest that is safe from predators and lined with the mother's fur. Mothers sometimes eat their young after birth for a number of reasons such as a stillborn baby. Baby rabbits are blind at birth and take approximately 10 days to open their eyes. They begin weaning at four weeks but should stay with their mother until they are six to eight weeks old.