K.J.
My first thought is: teeth. Have her teeth/gums been checked out by the vet? If she has a sore/bad tooth (or several) she may avoid the crunchy food.
Does she avoid hard biscuit treats too?
Maybe soak the Wellness in a cup of water for an hour so it's thick, soft, and soupy. She may not think it's 'different' and avoid it at first(because it doesn't smell extra special like wet food) but if she tastes it and notices that it's soft maybe she will eat it. Worth a shot.