You also need to make sure that your pet's minimum protein needs are being met with the food as well. (petpoisonhelpline.com)
I find no evidence that exceeding your daily minimum protein requirements is dangerous to your health, so when in doubt, err on the side of eating more, not less. (diagnosisdiet.com)
High value protein sources often cost more, while low value proteins are cheaper, more cost effective and still meet pet food guidelines for minimum protein content even though a dog can't digest the food well enough to absorb the protein that is in it. (dogs.lovetoknow.com)