with my leuc froglets I start to introduce enough for them to eat & finish. if you see them looking for more to eat maybe a few more added to the feeding . start with 10 or so flies too much at once . good topic
I would feed enough that the majority are eaten at feeding time, but also a few are left to pick off during the day. Too many left over flies will potentially stress the froglet. It is a good idea to have a feeding station(piece of banana) where the extra flies can congregate. Makes them easier to find and less likely to be crawling on and stressing the froglet.
more is better then less. I try to give 20-40 to each frog. 20 each is a good starting point.
froglets dont eat as much, at one sitting. start off small and build up. If you see a lot of flies left over, drop a piece of banana in to congregate the extra flies.
In a few months, they will eat a whole car if you let them.
just remember overfeeding is a common problem.......even at 3 months old, I only feed the froglets every other day. Once your froglets are 6 months old, I'd go to feeding every 3rd day. My adults I feed twice a week at most, except during breeding. When they are breeding, I feed them more often so they get more supplements.