Actually I never tried the PetTags no-bark collar, but have tried several other brands and they didn't work on our Pomarian. I didn't like the shock-type collars as I feared it hurt Hooch and it didn't stop him from barking. He now knows what "No Bark" means and sometimes we have success with that phrase. Of course, being 8.5 yrs. old, it took sometime and patience to train him. But, one thing I can say is that he's a great watch dog. He usually barks when someone he doesn't know comes into the house or drives a car on our parking lot that he hasn't seen before.
Have a personal question tho. How did you get the name 'Wolf" I used to raise Hy-bred wolves and am always looking for others who have an interest in the animal.