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.
Rabbits eyes come open at about 10 or 11 days after birth. Hand feed them until they are 14 days old. They will start eating on their own - hay, carrots, and rabbit pellets around 14 days old. They should be released into the wild when they are 4-6 weeks old. Don't keep wild rabbits together after they are 2 months old - they will tear each other apart. Do not mix wild rabbits with domestic rabbits.