pepper spray has been proven ineffective against some particularly aggressive and committed breeds.
sticks require a high degree of accuracy and strength...a 'bop' on the noggin just ain't gonna cut it.
can't carry a gun.
'Tasers' are one shot deals. Drive stun and or the non-projectile models require up close and personal utilization (if they work at all) and in that case, lethal force is warranted.
hypovolemic shock will stop anything...carry a knife discreetly, yet easily accesible. a 'waved' folder, or even an open folder secured in a sheath, if not a fixed blade...stab for effect.
if you're gonna tango with an angry dog, you're gonna get bit...accept that and proceed with violence of action.
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"It is a far, far better thing that I do, than I have ever done; it is a far, far better rest that I go to than I have ever known" - A Tale of Two Cities - Charles Dickens