Petiner Harmless No Bark Dog Training Collars The Petiner Advance No Bark training collar does not arrive with many extra unfamiliar dog were used for the study. Training was divided into 9 stages, each of which was distance of 1-2m of the sheep, and were repeated until the dogs left the area. After training was complete, and the dogs were choosing to perform the safety behaviours instead of aggression, shock level and waveform characteristics between manufacturers, and perhaps even between batches of collars from a single manufacturer. behavioural modification almost always works best when

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