These collars have two sensors on them.  They sense sound and vibration and know when your dog is barking out of control.

The “Petsafe Dog Bark Control Collar” comes stocked with a Temperament Learning System which makes these anti bark collars able to work across different breeds of dogs.

Keep in mind that there are two models available depending on which size dog you have.

There is the “PetSafe Deluxe Little Dog Bark Control Collar” and the “PetSafe Big Dog Bark Control Collar.”

The models are virtually the same but one is for smaller dogs while the other is for the more larger breeds.

One would be excellent for use dogs the size of pugs and terriers.  The one is good for dogs the size of golden retrievers (those breeds do not bark that much though) or German shepherds.

Petco makes excellent anti bark collars that train your dog not to bark by the use of zapping, or shocking, him or her when the barking gets to become excessive.

The sensors are wonderful at detecting whether your dog is barking loud or if he just barks a couple times.

Keep in mind that dogs are smarter than we give them credit for.  I found that my two dogs learned that the device would only go off after at least three very loud barks.  So they learned to bark just two times and quickly shut their trap.  I’m okay with that.

If me and my wife are at sleep, during night, and someone is trying to break into my home all I need is two barks to warn me.  Otherwise, in the middle of the day, I do not need my dogs to tell me every time someone passes by my house.

Petco Dog Bark Control Collars are a great buy.  You can usually get them for around $100.  A definite must buy if you want a little peace and quiet. Petsmart has every sort of collar you could want and as far as I know they are offering $5.99 flat rate shipping on orders of $60 or more