Purchase pet vitamins B, B1, and B12 for kittens to take daily. If the kitten is in unbearable pain, it should be fed with analgesics. In addition, it is best to send the cat to a pet hospital for examination and listen to the doctor's advice. During the growth period, the lack of vitamins in kittens can cause neuritis. The limbs will become weak at first, and in severe cases, they will be unable to stand and be accompanied by pain.