Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your time or money.

My husband and I spent close to $1,000 re-sodding our back yard to give our two female dogs a place to play. Quickly we began seeing urine 'burn out' spots and decided to find a supplement that works.We tried these for 1.5 months and more and more spots were formed. We gave these to our two dogs religiously and they made ZERO difference.For reference, we have one Aussie mix and one Chiweenie, so it wasn't because one breed was more resistant...Still seeking a product that works.