The frozen strawberries have a better calcium to phosphorus ratio than the cranberries. I don't know much about the diet you are feeding, so I don't know if it is pretty strict on the fruits and veggies to feed. Cranberries are on the safe list, so I would branch out to say, in my personal opinion, that the cranberries are fine, unless the diet you are using is strict on the fruits and veggies to be fed. Hopefully this helps.