| There are for sale on another site also.
We made our own "hanging bells". They work good until your puppy starts ringing them just to get attention and not to go out.
If that begins to happen, you just have to start timing the puppy as to how long it's been since he went out & only take him out every so many minutes.
We can't get Missy to "speak" yet so the bells are helping for the time being. |