This will be my third try at asking this question, because my stupid computer keeps freezing. I adopted a stray cat, which my vet estimated to be six or seven months old at the time. Started feeding him adult food, but the doctor said to use kitten food. He should switch next week, when he turns one year old. However, he s a Norwegian Forest Cat, which matures slower than normal. Also, he was malnourished when found. Should I continue the kitten food to make up for lost time? If so, when does he start adult food?