Didn't hurt, possibly helped.
It was worth the price for the chance of helping my two dogs get along better. Over time my girls have bonded, but I can't say it was because of this product. I also can't say the product didn't help. What I can say is that my Vet was very supportive of the use of the DAP collars and there is evidence-based research that shows it can help dogs in some situations.
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