I purchased this as my second receiver for my beagle. Both Labs use the stubborn dog receivers and periodically they eat them. Well they ate the one for my beagle too so I was rushed to order another. Delivery was relatively slow getting out of the warehouse. One thing that I really dislike about this particular collar is that the collar/receiver are a single integral unit. So if the dog outgrows the collar or you cut it too short (like I did) you've lost the receiver too. The other receivers for larger dogs can always be moved to another collar. PetSafe was very understanding after I misjudged the amount of excess collar to cut off and offered to ship me another collar. Another complaint is the battery life and the need for a proprietary battery. This adds to the overall cost of ownership. As far as performance, it works very well.

This collar works great for my 12 lb. dog. The battery unit is much smaller than the regular collar so it is obviously less bulky under her chin.

I purchased 2 collars for my small dogs. 1 of my dogs is yorkie size, the other a bit larger. The fit seems nice for the 5 lb dog. Since I have 3 dogs, I have a few concerns: 1.) I'm worried the rubberized collar will get ruined because they like to tackle each other by the collars (their regular collars). Petsafe said I should try the Cat collar which uses the same receiver and has a nylon strap which "can" be replaced if it should become damaged. Little Dog version is all one unit and you'll need to replace the whole collar and receiver as one unit. 2.)I set our boundry up using a Comfort-Fit collar for a big dog. The boundry is different for the two types of collars. My little dogs have to be almost on top of the wire before they get a tone compared to my big dog being almost 8 feet from the wire. So the flags are not a consistent distance for the little dogs. A Little Dog collar would have been fine for my big dog given his temperment. Not sure how long the battery life will be. Seems cumbersome to turn the receiver on after rotating it off to conserve battery life. Then, to be sure the collar is on after I rotate it to "On", I press the small control button to see if the light flashes which will let you know the receiver is on, you must be certain the level of correction did not change. Not too big a deal if you don't mind your dog getting a stronger correction. See, I want to take the collars off from time to time and then turn them off. But if you are in a hurry to let doggie out to go, you will have too much to do...at least for me with multiple dogs. Another concern is the dogs pressing the small control button while they are playing. Not sure on that yet. They may get the shock of their lives. I think this collar is a nice solution for little dogs. But also take a look at the Cat collar for your little poochie...Petsafe collars work with almost all Petsafe trasmitters (exception is the wireless and "Invisible Fence" brands). I'm going to give the cat collar a try, but it seems only avail. on-line. *I've called Petsafe customer support about 5 times and have had short to no wait times. The reps were informative and polite each time.