I strongly advise you to avoid Iams dry. Corn is the second ingredient. There are better dry foods on the market, Chicken Soup for the Cat Lover's Soul is a better food at a similiar price point to the Iams and it seems like most cats like it. There are other higher quality dry foods available as well, usually a bit more expensive. Based soley on ingredients, i'd feed Innova Evo if i had to feed dry, but neither of them seem to think much of it. But i feed Chicken Soup because that's what my dry junkie likes and it's still much better than the Iams i used to feed. I may try mixing in some Evo and see if she'll accept it like that.
However, if i could switch her to wet exclusively i would, because i do not beleive that dry is as good as wet. Cats are adapted to gain their moisture from their food and have weak thrist drives. Cats on dry will drink more than a cat on wet, and can seem to be drinking plenty, but still be dehydrated. Chronic dehydration stresses the kidneys, and kidney and urinary troubles seem much more common in cats fed dry exclusively.
My cats ate dry exclusively for years. To supposedly help their teeth - it did just the opposite. One of them required extractions, and was required to eat soft food only while it healed. She refused and we had a battle with anorexia, complicated by the initial dental surgery missing a tooth and another extraction having to be performed a month after the first, and a another run of painkillers and anti-inflammatories and antibiotics which didn't help her appetite. In the space of that month, she went from 8-1/2lbs to barely 6lbs. (Luckily she was so lean to start that it didn't trigger hepatic lipidosis.) She's back on dry again after offering her many wet and dry types, hoping she'd finally go for one. And Chicken Soup is what did it. 6llbs 6oz and climbing - finally.
The moral of the story is, if you feed dry exclusively, feed wet as well so they are used to texture and smell of it. They may need to eat it some day, and i firmly beleive that it's more healthy for them.