Homemade corn-free cat food

[majortom_thecat]

Hi!  I'm wondering if anyone can recommend a corn-free pH balanced recipe for cats?  The pH balance is very important because my cats have a history of crystals in their urine.  Corn-free because one of my cats is allergic.  I'll run any suggestions by my vet before trying them.  Thanks!

ETA  Thanks for all the suggestions so far!  I should have clarified that I'm looking for a homemade recipe.