Price search results for Guardian by PetSafe Spray Bark Control Collar (product no longer available)
For dogs 40 lbs. and up, with necks up to 28";. When your dog barks, a burst of citronella-scented spray is emitted. While not harmful, it deters excessive barking.
PetSafe Deluxe Little Dog Spray Bark Control
PetSafe Deluxe Little Dog Spray Bark Control, Small Dog