Frozen green cut beans, thawed or frozen, no calories in them or, boil one boneless chicken cutlet another calorie free food,give as much as you feel she needs, the rest wrap up and put in fridge for the next night, frozen peas or carrots have calories, if you're not a calorie counter you can these. Also frozen cauliflower,frozen, thawed or cooked a bit.
Fruit you have a large selection, just to name a few, apples, banana, blueberry's, cantaloupe.
Do not buy the pieces of melon or other pieces of fruit sold in plastic containers the supermarkets sell. I recently read an article they can cause Salmonella.
You can go online and search for fruits and veggies safe for dogs because not all fruits and veggies are safe.
https://www.google.com/url?sa=t&rct=...LzAtsUBqwoTHpl