Um, a deer will fuck you and your car up. Just saying. Swerving around a deer is a self preservation tactic. My sister has totaled two cars hitting deer and the second time around she was in the hospital for weeks...
Swerving caused me to lose control of my car and it pretty much ripped in half on a light pole.
I now just hit the brakes and hope for the best. Even when I see a dog I wont swerve anymore

I dont know whats best in that situation
I dont ever want to chance losing control of my car ever again. That sucked.