I had them in one of the 2X4 Butterfly Farm collapsible tents stood on end, with a 6-8 plants in gallon pots. However, although the food was running low, there still should have been enough until next morning, except they all went on a major eating binge overnight. Despite that, there was still food available on the adjoining plants, but unfortunately the doomed chrysalis apparently happened to be in the direct line of this cat's particular path to those surrounding plants. And, as said before, since they don't see well, he most likely took it for the food his senses told him laid in that direction.
As for my overwrought and melodramatic tone in my original post, my apologies. As anyone who knows me would say, the thought of harming any insect or critter, no matter how beneficial or destructive it maybe, is anathema to me. In fact, its gotten to be a source of constant annoyance (and even embarrassment) to my friends and family, as I'm constantly catching and releasing bugs back outside, not only at home, but in public places as well, such as groceries and shopping malls, etc. That, combined with my stopping to help every turtle, frog, and as well as caterpillars and other large insects that I happen to find crossing the road, has my mother in a constant state of fear whenever she's know I'm going to be traveling. So therefore, I guess I just kinda lost it there for a microsecond, as the irony of having raised all of them from eggs brought inside from the garden in order to protect them from falling victim to predators or any other such misfortunes as might befall them, only to discover that they were predating upon each other, was just a bit much for this overprotective dad to handle at the moment.
Anyway, definitely another lesson learned the hard way, although I still feel awfully bad for the poor little guy that didn't make it.