I know a lot of you on this forum have CRF cats, so maybe you can answer this question. My sister lost her CRF cat several months ago. Now, she is trying to feed her other three cats the lowest food in protein that she can find, hoping she can prevent them from getting it, too. Is that even possible? Her three other cats are all less than three years old and my concern is that they are not getting enough protein. Any opinions would be appreciated. Thanks.