The cat's milk engorgement is particularly hard. You need to help the cat expel the milk to prevent the cat from returning the milk or causing mastitis. It is best to let the kitten suck out the cat's milk. You can also express the milk manually, but be careful. When milking, you should first use a towel to hot compress the cat's breast, then gently massage the hard lump, and then squeeze it when the hard lump becomes softer. And when squeezing, do not just squeeze the teat; it is best to reduce the amount of milk with high protein content in the diet. food.