Take your time to steady your aim before your first shot. Animals will not be alerted to your presence until that shot is made. Zoom in and out as necessary. Zoom out if you miss to track your target better. You will earn bonus money if your shot hits a vital organ. This may be a requirement for some missions. The second rifle features an infrared view when zoomed in to help you target specific organs. The brain, lungs, and heart will be revealed. The brain and lungs are the most difficult to hit, and are worth a $10 bonus. The lungs are the easiest to hit but are only worth $5.