Sorry but the accuracy in this is just inexcusable and the score-killer. This hunter somehow can't hit the broad side of a barn. Honestly surprised nobody else brought this up yet.

You can try shooting the animals exactly. You can try aiming a bit in front of the animals before shooting. In the end the only thing that seems to work is randomly spamming and hope at least some animal(s) go down. Maybe it works better than that on developer's machine but that's how it works on mine.