I was somewhat dissatisfied when my dog was able to take the rolling ball apart after only an hour of playing with it and had the motorized internal parts in his mouth, It could have been a choking hazard. Before giving him the ball I did make sure the it was screwed together tightly and correctly, Great concept and I had high hopes that it would be a toy to keep my dog occupoed but I don't think it works for all breeds of dogs
Have not had a response yet - sent email about one week ago