Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Guinea Pig balls are TORTURE. INHUMANE.

Read title. Guinea Pig spines don't bend this way. They are not able to run in exercise balls. This is just for sadistic human enjoyment at the expense of living, breathing, and feeling creatures. Helpless creatures. Do not buy if you have at least some sort of a metaphorical heart and/or soul.