Like most things in life, common sense.
For me:
25 MPH leaving the cul-de-sac? Hit the brakes and steer around a rabbit or squirrel.
80 MPH on the interstate? Brake **in a straight line** if there is enough warning, otherwise, just brace for impact. If braking, let up just before impact to raise the front of the vehicle so your deer tartar is not sitting on your center console. Ask me how I know......
But generally, I will not roll my vehicle, risk a head on collision, and endanger lives to miss an animal to save it's life or the cost of an insurance deductible.
