Weaning should be done gradually and may require some patience.
At three weeks canned kitten food can be added to the formula in the bottle. Start with adding a teaspoon and increase the amount every day.
If the kitten food you use does not break down enough with vigorous shaking you can use baby food. Only use the plain meat baby food such as chicken or turkey.
Solid food containing meat should be a part of kittens’ diets as soon as possible to prevent iron deficiency.
After a few days start putting down a shallow saucer with the formula mixture that you have been feeding them. If you are using baby food you should switch to kitten food as soon as possible as this is healthier for them.
The kittens will walk in it, slide in it, and track it all over the place. Usually one will begin lapping right away, and in its anxiety to consume as much as it can, it will often bite the edge of the plate.
Some will prefer to lick the gruel from your fingers. Some will start licking your finger after they sniff it, then slowly lower your finger to the plate and hold it to the food.
Always offer the kittens a bottle afterwards. When the kitten is ready it will stop eating from the bottle and merely chew on the nipple or try to bite it. Be careful if a kitten bites the nipple off as it can cause damage.
Keep thickening up the gruel until they’re seven weeks old, at which time they should be eating undiluted kitten food.