The kittens are getting so big and very fast, LOL! They are walking ALL OVER my room and even venturing into the living room when allowed. The babies are three weeks old (as of past Friday) and I was wondering at what age do I start introducing wet kitten food? Grey is doing great feeding them, but she is looking more skinny to me and even though she is eating two cans a day of wet and all she eat dry she is still loosing weight. I noticed that she will not eat all the wet food when I put it down, but rather in several smaller meals through the day.