I am moving Psyche and Simi out of the farm house and into a duplex in the city with me (gulp) very soon and am working on a budget with the boyfriend and am trying to figure out how long a bag of food will last us. We currently feed Taste of The Wild and the Costco Nature's Domain Grain Free stuff mixed. Simi gets 1.5 cups, twice a day right now. She is at a healthy weight, so I'd like to keep her at that. Psyche gets 1 cup, twice a day, and is also a healthy weight. When I move they will likely be putting them on only the natures domain stuff (because mom drives an hour the other way to get the TOTW). They are 40lbs bags. Can anyone help me figure out here how long a bag of food is going to last me? We are kinda clueless because we haven't had only two dogs in a VERY, VERY long time. Thanks in advance!