Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Used to make a great chicken waterer.

I bought this to use for my six chickens as an alternative to an $80 heated poultry fountain. So far it is working perfectly. My dog's water dish has been frozen every morning this past week or so (she's an indoor/outdoor dog though so she gets water inside also) but the chicken's water has not frozen at all. I am very happy with this product so far. I will come back and write more about my experience with it as the winter season progresses.*update 1/16/12 - The temps have been in the low 20's to upper teens overnight for the past week or so (not counting wind chill) and the water in the heated bowl has been frozen every morning for at least a week now. I don't know why it is freezing since it was designed to keep the water thawed, but regardless, it is not doing its job and as is, it is completely useless to me. Guess I'm going to have to buy that $80 heated poultry fountain after all. *sigh*