Purina NF is not available in Canada due to some ingredient Canada won't allow. That is what I have been told. You can only get the dry here. Which sucks because my CRF cat likes it too. Not that I love the ingredients in any of the rx diets but it's the results we're after right?
I feed my cat a rotation as he is picky as heck. I feed holistic selects turkey & barley, wellness turkey, wellness chicken, Natural Balance's limited ingredient foods (duck, salmon, chicken and venison favours), k/d, Medi-cal reduced protein and royal canin renal lp. Sometimes I will feed him food he shouldnt have because he will refuse everything. I feed him 1/2 can three times a day and cannot feed him two cans of the same food in a row, sometimes he won't eat the second half of the can. This is a problem with cats with CRF I think.
Give a dog food and make him prosperous, he will not bite you. That is the principal difference between a dog and man. (Mark Twain)