I recently started feeding ZiwiPeak Venison to my dog. She is supposed to get 5oz per day or "2.5" scoops per day according to her body weight & activity level. I noticed that when I scoop the food & measure it per scoop that it isn't equal to the amount of ounces she needs per day. Should I just go by ounces? I feel like that is the more accurate measurement. I have a very accurate kitchen scale so measuring per oz is not an issue.