I have been feeding my two 4 month old female kittens Felidae dry which they really like. I free feed as they are still growing. I quess when they reach one I will stop free feeding and measure. They weren't too crazy about Felidae wet food, so I tried Nutro Max Cat canned. They seem to like it, however I wanted to introduce a better quality wet food as I plan on feeding them more wet than dry when they are older. I currently give them wet in the a.m. and wet in the p.m. I have recently been adding other brand canned foods to their diet. I know I am supposed to gradually add the new foods over a weeks time until they are used to them but my question is, when I add new foods, should I add one at a time and can I eventually give them all of the different brands alternating ( for example, Wellness one day, Nutro Max Cat another, Merrick another, etc) or is it not a good idea to give them too much of a variety? I will continue feeding them Felidae Dry too.