Yes these training tools work.
Will i ever use them? No.
Because I wouldn't ever want to put my dog in a position to where he needs to feel uncomfortable. I dont want my dog to associate environments or equipment with anything uncomfortable.

seen from T1

seen from Germany
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seen from United States

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seen from T1
seen from China

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seen from United Kingdom
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Yes these training tools work.
Will i ever use them? No.
Because I wouldn't ever want to put my dog in a position to where he needs to feel uncomfortable. I dont want my dog to associate environments or equipment with anything uncomfortable.