Liner Slips or Squawks are Slippage of the liner and teat cup during milking. Caused by a sharp change of milking vacuum within the unit or cluster by drawing in air alongside the teat. Generally creates a "squawking" sound.

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Other /More definition:
Liner Slips or Squawks are Slippage of the liner and teat cup during milking. Caused by a sharp change of milking vacuum within the unit or cluster by drawing in air alongside the teat. Generally creates a "squawking" sound.