Deb the makers of KMR Hartz Pet Products also makes a weaning formula called In-Between- I start using that about 6 weeks for the litter. I do not push the solids, they will go to them in time. You want to get some quality canned kitten food (I use IAMS) and some good kitty chow- I use Royal Canin BabyCat34 You want to offer the food in a mushy form, either mixed with KMR or the weaning formula, or just warm water. I put the food in small jar lids. I put a tiny bit of food on the kitty's front paw and a dot on the tip of the nose. They generally will take to it pretty much right away, but if they don't I don't force them. Some are ready before others are.