Personally I wouldn't feed any sweet feed if they already ate treats, supplements, etc. Most probably they already got too much. I'd call the vet, explain the situation in as many details as possible (including how much was eaten), and see what the vet has to say.
"Life isn't about waiting for the storm to pass: it's about learning to dance in the rain..."
"When we are no longer able to change a situation - we are challenged to change ourselves."
"How people treat you is their karma; how you react is yours."