Yet, high levels of salt will contribute to kidney disease, heart disease,
and
FLUTD. Hopefully that would be counteracted by the increased water intake,
but
do you want to take that chance?


No, of course not.
How do I know how much salt is in the food?

You'd have to call the manufacturer and ask them what the sodium levels are on
a DRY MATTER BASIS. Do that with several foods and compare them. If the
manufacturer doesn't know the levels, then you know to avoid that food
altogether. There are a lot of cat food companies that are more concerned with
selling a lot of cat food, than are concerned with feline nutrition.