Gliders appetites vary just as human appetites can.
There are many things that might cause them to eat less for a few nights - changes in weather, full moon or they may be in heat. Only the gliders know.
if you are feeding them the BML mixed with the fruits and vegetables - change things up and offer the BML separately or on the other hand if you already feed the food items separately try letting the BML melt over the fruits and veggies.
You can also just wait another day or so and see if the gliders just start eating everything again on their own.
They each have their own bowl as they always have and they don't seem to be aggressive towards each other.
I always wonder if gliders actually know they are supposed to eat from their own bowl.
I offer my colonies one plate but it is a divided baby plate with veggies in the largest section, fruit in a small one and their GliderKids Staple in the other small section. They all gather around the plate and share nicely because they can all eat easily from the large dish at one time. They do like to grab a piece of fruit or veggies and carry them to their personal favorite spot in the cage to munch on though.