My opinion is to stop feeding kibble, despite what your vet recommends. There is no such thing as a "good quality" dry. Some are less bad than others, but why even go that route if you don't have to? Your cats like wet food, so stick with that. Maybe try introducing some bits of fresh meat (raw or lightly cooked) as treats if you haven't already.
"To close your eyes will not ease another's pain." ~ Chinese Proverb
“We must not refuse to see with our eyes what they must endure with their bodies.” ~ Gretchen Wyler