Task: Sentiment Analysis
Input (English): I'll admit, I am reviewing a product I have not used.  The reason is that wheat gluten is about the #1 cause of allergies in dogs.  When wheat gluten is broken down it gets very sticky, so it coats the cilia of the digestive tract.  This can cause irritation, and cause the immune system to actually destroy the lining of the intestines.  This means that your pup might not be able to absorb all the nutrients he is eating.  Often allergies show up as 'hot spots' where the dog gets itchy and possibly scratches fur off.  The problem with food allergies is it's possible that they won't be obvious because all the damage will be internal.  So, I have not seen a problem with this product, but I have known dogs who have had terrible reactions to wheat.  It's the same things as "gluten intolerance"in humans, but it's much more common in dogs who are not quite as good at digesting grains.  Wheat flour can be bad enough, but including concentrated wheat protein is much worse - because that is what causes the allergies.
Output (English): Negative