If a Fox or any other similar sized (or less)animal runs out in front of my vehicle then tough. It gets hit.
I won't try to swerve as that might cause me to lose control of my vehicle and cause an accident which might result in injury to myself or other road users. Would i have any feelings for the animal? Yes, Ones of indifference.
Foxes are Vermin, cause a lot of damage and imo, far too prolific.
They should be culled by any and all means.