I hope I've posted this in the right place - apologies if not!
I bought my first VFT about two months ago from a garden centre, and having carefully looked after it as instructed, it's doing really well - it's grown lots and is looking really healthy.
However, whenever it catches a fly (which so far has only been about four times) it always either:
a) Opens its mouth within a day or two to reveal the fly still inside, or
b) remains shut and starts going a black/brown colour as if it's being eaten away from the inside (at which point I remove that particular leaf).
Is this normal? Or is it just not hungry? I've never force fed it - all the flies it catches have gone there of their own free will!
Any advice would be gratefully received.