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.
Once kittens reach 4 weeks of age, their mother usually begins to wean them off milk and onto solid foods. Because the weaning process can take up to six weeks, purchase a small amount of kitten milk replacement formula and mix it into your kitten's food during his first two weeks with you.
Feeding Kittens: What, When, How Much. Experts answer six common questions about kitten food and more. When it comes to cuteness, few critters can compare to kittens. If youâve just acquired a kitten (or two), youâre probably learning all about kitten care. You want to do what you can to ensure that your adorable baby grows into a healthy adult. Proper feeding is a big part of the health equation. After the first four weeks of motherâs milk, a kitten gradually transitions to kitten food, and is completely weaned at about eight weeks.