I bought one for my Basset hound named Walter.
Nice dog but dumber than a brick. Actually, I think he was incapable of learning much if anything.
If someone would have broken into our house he would have licked em to death
When you got out of site of Walter he would start to bark. And bark....And bark. For hours.
I couldn't stand it. The neighbors couldn't stand it.
I bought a shock collar as a last resort. Hated to do it.
Walter understood that, real quick. That was about the only thing.
When he barked, it poked him.
He would literally stand there and shake like he was ready to explode if he couldn't bark.
One time I had the voltage turned up a little too high and the meter man came and Walter barked.
It poked him and he yelped. It poked him again and he yelped again.....and again....and again.
I had to run out and tackle him and hold his mouth shut.
I felt really bad. Good thing I was home.
If you buy a collar turn the power down to it's lowest level and bring it up slowly till the dog understands. Don't go too high.
Good luck,
Steve