Once again I appreciate your observations and continued experiments. Last night when both pacman's were huddled in the corner I tried what you suggested, just offering just a few pellets, Ken's sticks and a Massivore pellet cut into 4 pieces. They immediately snapped at the mix, then wiggled, as they do, spreading the offerings around in their spot. I did notice them inhaling then spitting things out, the 1/4 Massivevore chunks in particular. Not sure what they ate or didn't really but surely were interested in the mix overall. A few minutes later I gave 'em a small bit of thawed bloodworms and got the similar snapping reaction too but less so. By virtue of their overall shape and protruding lower jaw, of course means that they are best at being predators hidden in the substrate waiting for prey to come near and their morphology suggests they could excel at feeding near the surface too. They are not built to be a bottom feeder such a synodontis for example, they apparently refuse to stand on their head to feed on the bottom as other cats do, unfortunately. Because they are new to me and all, for now I don't mind doing the specialized feeding techniques to accommodate their way of feeding. With all my other fish and tanks, feeding is just a matter of tossing in individualized mixes of pellets and frozen stuff then turning off the lights, done. The pacman's may present a problem when I go on vacation for a week or two, having my petsitter come by to feed the fish from preprepared individualized portions for each of 10 aquariums including the frozen cubes and some needing the live nightcrawlers, etc. Were he or I to just do that with the giraffe cat/pacman tank, the giraffe cat will get all the food. I ask a lot from my petsitter already with needing a half hour just to feed the fish as it is, not to mention looking after my cat. He's very good at everything he does and I tip him well. I'm a bit reluctant to ask him to go through what it takes to cater to the pacman's special needs, such as they seem to be right now. Worst case scenario would be to just increase the guppy population before I leave and hope for the best..