I think you are thinking of the phrase  the other way around , which does essentially mean the opposite, but in a specific way. The specific nature of the other way around is that it means that doing what you say in the opposite direction is correct, not necessarily the exact opposite.
You can offer your kitten either dry food, canned food, or both. Be sure to choose food which is designed for kittens. They require a diet which is especially rich in protein, calcium, and other nutrients. Cat food that is for adults is not sufficient.
Your four-week-old kittens can eat dry food but it may be tough at first; make the transition easier by mixing it with kitten milk replacer. Buy this milk replacer at pet and farm supply stores and some grocery stores. Donât use the cowâs milk you drink or youâll likely end up with sick kittens on your hands.