First, feeding her four cups at one time is really not the best thing to do for her. It will be healthier for her if you feed 2 cups twice daily. Don't cut back on the amount total per day until you see how she does, meaning if she loses weight or gains too much on the four cups. Dogs are like people, four cups may make one dog porky while another dog may stay rail thin on that amount. It also depends on what food you are feeding. The calories differ from one food to another. I can feed my 90 pound male the same as my 65 pound female and she doesn't gain and he doesn't lose (weight).
No exercise means just that, especially in summer where they heat up very quickly. No walks other then short (10-15 minutes) walks to potty, no running zoomies.
Now that the business is over...pictures?