Something to consider are these frogs natural diets in the wild, which consists of 70% vertebrates (other frogs). Most of the information you find regarding the feeding of these frogs consists of information on insects as a primary food source. This is fine, but you may have better luck regarding their overall health with a diet that consists of insects/woms and, if possible, a reliable source of feeder frogs.
My ornate also seemed to be very partial to crayfish, which are an excellent source of calcium.