There are several types of bark collars on the market, and we generally don’t recommend them. The main drawback of any bark collar is that it doesn’t address the underlying cause of the barking. You may be able to eliminate the barking, but symptom substitution may occur and your dog may begin digging or escaping, or become destructive or even aggressive.
A bark collar must be used in conjunction with behavior modification that addresses the reason for the barking, as outlined above. You should never use a bark collar on your dog if his barking is due to separation anxiety or fears or phobias because punishment always makes fear and anxiety behaviors worse.