Mine don't love wellness cans either. Different cats like different foods.
If you rarely feed wet food then it may just be that they aren't used to it. Cats can develop addictions to their food if they eat the same kind all the time. Wet is better but transitions need to be slow. I'd also try different brands and flavors. Evo makes some really great quality wet foods, I'd recommend those over Wellness's regular wet foods.
My cats' favorite seems to be Before Grain's 100% Quail - but since it is all Quail it can't serve as a primary food (they need vitamins too).
I'd suggest looking through the store for awhile and reading the ingredients for all their cans. Look for as many named meat sources as possible and avoid things that clearly aren't meat or vitamins (like wheat gluten). I'd suggest picking out several foods and rotating what you feed them each day. Mine get a bit grumpy if they get the same wet food two days in a row.
Mine don't entirely dislike wellness, but it's not their favorite. Their least favorite seems to be Spot's Stew, which has chunks of veggies in it and peas - when they do eat it they always manage to leave the peas. But if you want to let yours try it my stupid question has a link to get a coupon for it:
http://answers.yahoo.com/question/index;…
They all like different things and mine will actually snub a food one day and the next time they have it they love it. Cats like to be complicated.
I may be reading this wrong, but I hope you didn't mix the dry and wet foods together. Unlike dog food, dry cat food goes very bad soon after getting wet (bacteria).
good luck in your search!
edit: I forgot to add a link for some cat food suggestions:
http://cats.about.com/od/catfoo1/tp/tpca…