Since both your babies I believe are fairly small I'd only give a teaspoon of pumpkin at a time. Since you gave a full tablespoon tonight ( if they ate all of it ) give it a day or so before giving it again.
We don't want to have them go from runny stool to not being able to go at all.
Typically if you feed the rice and burger for at least three days and then start slowly adding dog food back in your good to go.