you know my husband trained my coco to ring the bell but he didn't want to use those kinds that hang on the door because he thought that it would confuse him, seeing as whenever the door would open the bell would ring and it was so bulky. he wanted something that will only be rung by only him hitting it with his paw. so my hubby bought those silver little bells that you find on the collars and attached it to a spring and tacked it into the corner of the wall right next to the door with a tacking nail and it works great...
