We have 2 adult Smithfield working dogs that have had a long term barking habit.
Its only taken a few weeks with the collars to show behavioral effects. Before the barking collars they would become so excited they would start biting tires or bashing madly around their enclosures for up to 5 minutes.
Amazing changes in behaviour!

It works brilliantly. The neighbours tell me he rarely barks now and I notice that he just does a soft bark sometimes and then stops. I lost one of the short probes recently and emailed Pet-Tech who replaced them for me at no charge. Amazing as it was my fault I lost them.

Very happy with this collar for our large breed dog. The buzzer is stronger enough for him to stop chasing bike riders, plus the bark collar has been good with the noisy neighbours. YES I recommend this product, thank you to PET-TECH have a good Christmas break.

Love the outcome. Controls my Big American Johnson Bully, has only had it on for 1 week and he is so much smarter.

I have had 4 mates go and buy them since seeing the outcome