Well, I do recommend feeding at night or at least in a very dark place. I moved my entire rack into my closet and fed them all in the dark. Except for my adult who is being quarantined. I also fed them when they were in their hides. My albino refused earlier in the week, so I put a different hide in her bin. It seemed to do the trick.
Also, warmed up the rat pups with a hair dryer until they were nice and warm, and let them sit in a bag that had mouse droppings in it.

I think think lady luck played a pretty big part in this too! There are tons of threads with tricks. That is why I thanked the entire community!

OH, don't try offering them food every day, I waited a few in between.

Good luck!