I agree with the supposition that all dry is not the healthiest
diet for
cats. All of ours have eaten dry in self-feeders, but we give them each 1/4 can of wet food twice a day.
It took us almost 6 months to get Teia eating wet food, had to keep presenting it, trying different flavors. Even tried people tuna, which she still does not like. Finally, she started doing more than just sniff and lick.
Her eating technique was quite awkward, ended up pushing a lot off a flat plate.