I am feeding my cat commercial raw food. Started with Rad Cat, will be switching over to Primal & Instinct. She always wants taco chips when I eat them. I think she is after the salt. I thought feeding her raw she was getting everything she needs. Should I be adding salt to the raw. By the way she loves the raw. When I don't have it & give her Tiki Cat she doesn't eat it right away. Looks at me like "is this all you have?".