I agree,
Wasting 22lr rounds on feral yapper dogs is insane, it’s darn near impossible to buy those these days.
I’d go with a Stahl weed wacker with the heavy cable
Save the cable, save teh ammo.
Messicans eat those dogs. That may be why they are such nasty beasties - they know their place and fate.
So, why stand in the way of fate?
Call some Messicans. They will end that mini-mutt problem.