It sounds like your babies eat better than I do!
My own feeling is that unless there is a physical problem most pups will eat when they are hungry. If they don't eat what you give them, pick it up after 10-15 min. & don't give them anything until the next meal. No, they won't starve---just be sure they have water. I think, in all honesty, they may be playing w/you a bit.
Welcome to SM!
Qui me amat, amet et canem meum. (Who loves me will love my dog also.), - St. Bernard
"Life without a maltese is like summer without ice-cream." - St. Edelweiss
"Wag more Bark less"