We bought these bells before we brought home our 8 week old Golden Retriever puppy. When we brought her home we showed her how to ring the bells when she had to go out and she started using them almost immediately. It literally broke within 2 days! The bells have been abused from swinging and chewing on them during her puppy moments, but they have withstood her abuse perfectly and still look great. I would recommend them to anyone looking to get a puppy! Update 11/30/14: Our pup has been alive for a year now and we still have the bells on the door so she can let us know that she needs to get out. Sometimes she asks to leave more often than we want to get up (e.g. every 5 minutes) and so we ignore her. She'll get mad at us, chew on the bells and slap them with her paw like crazy. Seeing that she's chewed on almost every toy she's ever been given, I can't believe these bells are still in great shape. They are very good quality and worth the money I spent on them.
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