Bests & Worsts Reviews from Amazon

Wasted money. My Yorkie wore for about 3-4 days and began shaking as if she was cold and next day began to throw up even though she had not ate and I finally thought about what was different with her and realized the collar and I removed and gave her a bath and then gave her some karo syrup to give her some sugar and within 3-4 hrs I noticed she began to pick at her food by next day she was running around and doing fine. The collar said it was for 5-17 lb dogs so if it had enough strength for a 17 pound dog it was too much for a 5 pound dog. Threw away good money, hope it helps you.