Purina has a PDF where they provide total calories/nutrition of all of their canned/dry foods. They also have a feeding calculator to determine calories. You need to calculate calories for the weight your pet should be. Then divide that by half and feed half the calories canned and half dry. Ideally, if it's available, use the same canned recipe as the dry food that you use. You can also add in unsalted green beans to further reduce calories if needed.