[4 Training Modes & 4 Channels] This dog shock collars for medium dogs features 4 effective training modes: beep, shock (1-99 Level), and shock boost (10%) to efficiently train your dogs and ...

There are different types of shock collars: those with a button you have to press, which hurts your pet, and those that react automatically to any noise. Setting aside the question of what kind of ...

He uses an invisible fence system which gives the dog a shock if it passes beyond certain markers in his yard. The collars use special ... was required were a few small cuts to the plastic casing ...