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Review on ๐Ÿถ HERM SPRENGER Dog Training Whistle: Stop Barking with Adjustable Frequency Silent Ultrasonic Sound - Made in Germany by Nicolai Goler

Revainrating 4 out of 5

Be patient and do a little research.

This is the first dog whistle I have ever used. The mechanism is easy to change pitch and the construction seems solid. The sound is audible to the human ear, as far as I know most dog whistles are not silent. Dogs and cats react to sounds. One star deducted for lack of instructions or information.

Pros
  • Training and Behavior Guide
Cons
  • Secret