[censored]'s were barkers. Doorbell rang, they'd go wild. Somebody walking on the greenbelt behind our house, they'd go wild. Invested in bark-collar. Self-activated when they barked. IIRC, had five or so settings, from "tickle" to "electric chair" (I exaggerate slightly). Started on low setting, and, in steps, went up to something that got their attention. Didn't take long to work on both.

Occasional relapses, but I swear they know what I mean when I threaten to get the bark-collar out. They get quiet real fast.

And for your peace of mind... I don't think they're any worse for wear. My wife is the most dog-sensitive person you'd ever want to meet, and even she's a believer. Waiting for her to use it on me so that, after 25 years of marriage, I do the right thing with the toilet seat. <img src="/images/graemlins/grin.gif" alt="" />

And BTW, doing the adoption thing is very commendable, especially an older dog.