Can my skinny nursing cat turn milk replacer into her own milk?

Milk replacement for cats is fine to give her, but please know it's very serious when a cat won't eat. If they go long enough without eating (about 72 hours), they will develop a fatty liver. A fatty liver is fatal without treatment. You need to take her into a vet now, especially since she is nursing kittens. She may have a severe post-partum illness. Take her kittens with you to the vet.

She does look underweight, when was the cat she is nursing from pregnant? the milk will be sufficient only if the cat she is nursing from gave birth in the past few weeks, if not then you must feed her with kitten milk replacer which you can get from the pet shop.

It would be the right time to start introducing solid food gradually. Initially just mixing it with kitten milk, then over 4-5 days wean her off onto solids completely. She is too big to rely on milk only.

Try tuna fish or salmon. It has a stringer odor and often times they like this. If she eats it well you can start mixing the juice to regular dry food to get her used to that. If she is still being picky and licks milk you try adding that to dry food and see if will eats some soaked in it

At six months of age, Ritsu is way past the point of needing to nurse from his mother, and I would not encourage that behavior by giving him kitten milk replacement. It can take some kittens up to eight weeks of age to fully wean, and that's normal. He may be trying to nurse off of her for comfort, but it is concerning he's having trouble gaining weight. First thing to do is to make sure he's eating a high quality kitten formulated food, such as Hills Science diet or Royal Canin. You can try soaking the dry food in gently warmed low sodium chicken or beef broth, or tuna juice to tempt him to eat the dry food. If that works, then slowly reduce the amount of liquid you soak his food in until he's eating the dry only. Also make sure he is up to date on his deworming treatments, as intestinal worms will prevent him from gaining weight. Finally, I would have him seen by a vet for a health check. The vet can identify if there is a medical issues causing him to gain weight, such as an inability to digest nutrients properly, and can discuss treatment with you. I hope this helps :-)

There is nothing specific you can give Bella to increase her milk supply. I would give her a kitten formulated food, as diet can sometimes help. You likely will need to supplement the kittens with KMR (kitten milk replacement). I would go get some now as well as bottles to feed the kittens. Best of luck.

It is perfect to feed the mama cat kitten food as well as long as she is feeding her kittens. This is correct! This should provide her with the energy needed to stay in good condition and also give enough milk to raise her kittens well. Please leave the kittens with their mama until they are 12 weeks old, as she will teach them everything necessary to become good cats (cleaning, toileting, hunting, etc.).