Instruct: Classify the given review into positive or negative sentiment.
Query: poor product information

I bought three of these for my Cavalier King Charles Spaniels. When they came I found that the dogs need skin contact to work and my breed has chest hair. Can't use this product without cutting their hair and as they are show dogs I won't do that. It should be on the product information that this is for short haired dogs. Also it's not returnable as citronella is considered toxic and can't be sent back.