If you have never used a whistle before it does not matter what one you use, the only difference is the tone or pitch. If your musically minded you will notice that the 210.5 is half an octave higher than the 211.5. Some dogs respond to a higher pitch and some to a lower one. But either way the whistle is a vital tool to have in any dog ownership. This allows you to communicate with your dog, and how your dog responds to you. It is ideal for recalling your dog back and other training purporses. The shepherds whistle is ideal for those with Collies.
Both the shepherds and the other whistles come in a variety of colours.
