Well, you already know that these neighbors are irresponsible with a capital I! They have been in trouble already with your other neighbor, and they are STILL letting those dogs loose. Inconsiderate, RUDE people!
Call the authorities and make sure a complaint is filed, and TAKE THOSE BUMS TO COURT! If you use the "SSS" technique, that'll be too easy for them, and others are right, they'll just get another dog or two.
Make things inconvenient and expensive for them. They'll have to pay court costs and fines, and restitution to you as well for the chickens their dogs killed.
Whatever you decide, good luck! I talk the talk, but I always get very nervous
about confrontations.......

Call the authorities and make sure a complaint is filed, and TAKE THOSE BUMS TO COURT! If you use the "SSS" technique, that'll be too easy for them, and others are right, they'll just get another dog or two.
Make things inconvenient and expensive for them. They'll have to pay court costs and fines, and restitution to you as well for the chickens their dogs killed.
Whatever you decide, good luck! I talk the talk, but I always get very nervous
