Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Allergic reaction

My kitten's eyes got mucous, so much so that I had to clean her whole face with a warm wash cloth each morning. After calling about the rest of the litter she came from and finding out none of her siblings had eye problems, I realized the one thing different was the new pine litter. After going back to regular litter her eyes cleared up.Too bad, it really cuts the odor down a lot, plus the litter has a nice pine smell. Apparently it is too strong for my kitten.