What's a good way to tell when I've fed my frogs enough? I've been feeding them once a day slowly over the course of an hour or so (while I'm in the herp room cleaning snake cages). They never seem to get tired of eating and will keep going unless I cut them off. Is there a rule of thumb for # of flies or anything? They all seem to be growing at a pretty good rate with what I'm doing now, but I don't want to over do it....
Also, on average, how many D. melanogaster cultures do you keep going for 4 frogs? I have 4 cultures going now & seem to throw out more flies than I use... lol... is it easier to keep less cultures of a larger fly (like D. hydei)?

