Feed the dog and cat once a day; they self-regulate, so simply provide one cup of food in each bowl, and they'll eat at their own pace. The dog should be walked at least twice a day or let out whenever he signals by waiting at the door. The litter box can be cleaned as needed. The plants get watered once a week so it is not something you would have to worry about.
2 Pets: 1 dog, 1 cat