Is it safe to not refill my gerbils food bowls until they’ve finished everything?

I have been feeding my gerbils VitaCraft which is a mixture. The lesson I’ve learned is that they will pick through it and selectively eat what they like the most. This means they might not be getting all the macros they need.

Would it be safe for me to not change their food bowls until they’ve eaten everything?

I also sprinkle the food in the cage for foraging, but I just feel safer knowing that I can also see theyre eating from their bowls. Haha