I used to feed mine every day but I realized already they're starting to become slower. They used to jump around, now not so much. So I'm backing off on the food a little bit. Gonna base it on how full their abdomens appear to be. Never gonna go more than three days, though. I also don't think it's healthy for them to drag their abdomens or look so large that they appear as if they could split in half.I get what you're saying though about the too much feeding.
I have seen pictures of them on here where they look like they are about to split, and I guess they actually can split open.
That's just scary.
I don't like the dragging abdomen thing.
So I feed mine every day except on a day when I know they had too much the day before.
I've heard people talk on here before about mantid's barfing, and I personally feel like mine do it if they are overfed.
Maybe I don't know what I'm talking about but I know it only seems to happen when they have pigged out!!!
But I do think nymphs should be offered food every day unless they are gonna molt ya' know.
I had a nymph that kept barfing and I thought it was for a different reason, but maybe it IS because I fed them too much. In my experience, mantids don't have much control over themselves when a prey walks by - they're going to get it whether they're hungry or not. A nymph was actually in the middle of eating when another fruit fly walked by. She dropped the one she was eating and went for that one instead - it's their instinct.
And the way I feed my nymphs now is I put them in a huge cage (it used to be my bearded dragon's but he got a new one) with dead leaves and sticks and stuff then I put some fruit flies in there and let them look for and catch them by themselves. One molted as this happened, coincidentally.