I would say most of the members here do not feed raw. If your breeder has fed raw and you want to continue, that is probably best for your kitten. Your breeder needs to show you how to prepare the food. It's not just buying a raw chicken and feeding it. Most need to be prepared as your baby will need taurine (from the organs) and calcium (from the bones). However, if you do not want to continue to feed raw, that's fine, too. It's a personal choice. Your breeder should send you home with some food -- or you can even purchase additional food from her and freeze it. There are also online sources for raw food.
I've never transitioned a cat from raw so I am not sure if you simply mix in the other food or try the new food at a different meal.
I do know the members here who are feeding raw say it is the best way to go. However, it's not a perfect solution for everyone. So, it is up to you.
I would like to add that any type of commercially manufactured canned food be of the highest quality. (check ingredients and buy nothing with any meat byproducts in them. Byproducts are making the pets sick and have killed many.) Chewy.com is a great source for manufactured food and the ingredients are listed.
Just know, too, that it can take a while to find a type of canned food that your kitten will eat. Cats are finicky, you know.