If the change in diet is not going over well, you may want to try a slow transition. Give some of the old food, mixed with the wet. Cut down on the proportion of dry and give a bit more wet each day.
My cat Wink was a dry food addict. He would chew through the bag to get to the dry food. Still would if there was any dry in the house but I got rid of it all.
FDMB member, Dr. Lisa Pierson, is a vet and has a great website with a whole list of transitioning tips for getting dry food addicts to switch to wet food. I probably used a dozen of these tricks to get Wink to switch over to wet food.
I tried these tips: Heat up the wet food until mouse body temperature, chip and dip, sprinkle parmesan cheese on top, crush the dry food and sprinkle that on top of the wet, mix some of the wet food with the dry, add tuna water to the wet food to make it more tempting, hand feed, roll the food into tiny balls and hand feed, sprinkle the food with flortiflora, sprinkle small amounts of cooked chicken on top but pressed into the wet food a bit, try different flavors ( he hates fishy flavors, loved turkey and giblets).
I slowly cut down on the amount of dry food and fed more wet food. I did this for 3 weeks and then stopped all dry food at once. By that point, he was only getting 2 tablespoons of dry food where he had been eating a cup of dry food.
Her website is catinfo.org and the specific document is this one:
http://www.catinfo.org/docs/TipsForTransitioning1-14-11.pdf
