Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not buy if you have a medium sized dog.

I have a english bulldog and I thought it would be nice to have because he drinks so much water throughout the day. The amount of water that is in it is just fine. But it gets dirty so fast! Its like having a regular bowl but its electrionic with three pieces and its a real trouble to take apart just to clean two times a day! Please do not buy it if you have a medium sized dog. It will be disgusting within hours. So much for having "filtered" water.