Its trial and error I think. Mine eat more good quality dry food, but Poppy especially likes a pouch, but they only eat half each anyway, even when I've put down a pouch each they don't eat it all. In the summer I mix some water in with the pouch.
They do like their water fountain though. If only to make a splash and wash there feet.lol
The wet food mine eat is Gourmet Perle or Solitaire.
New little fella coming home with me today will be quite safe with his whiskas, as the other 2 won't touch it.
Nicky