When four out of five dentists recommend a certain toothpaste, you have to take the claim seriously. But how do you evaluate a claim like that for Nutro Natural Choice dog food which advertises “8 out of 10 dogs prefer Natural Choice Lamb & Rice Formula*”?

*MOUSE PRINT: The asterisk refers to a fine print footnote that says, “Based on paired preference tests performed 10/2008.”
When Mouse Print* asked the company in an email to explain exactly how the test was done (Who interviewed the dogs or did they fill out a written questionnaire? Did you have a translator for foreign breeds? <grin>) the company declined to specify the methodology but rather invited a call to customer service. Upon doing so, the representative spoke only in generalities off the top of her head without real knowledge of the protocol. And, being transferred to a supervisor only resulted in being deposited into voicemail.
Assuming the test was conducted in a legitimate manner, their own data do not support the claim they made that 8 out 10 dogs prefer their Nutro. When tested against Science Diet, only 67.3% preferred Nutro, not 80% or more. Likewise only 73.3% preferred it over Natural Balance brand. In no example given in the ad did eight out of ten dogs tested prefer Nutro.
Certainly, Nutro did well in the tests, just not as well as they advertise. Hey, Nutro, why even make a claim that your own data contradict?
  
