Generally speaking, if a male dog is sterilized in the hospital, it can be taken home on the same day. The dog should be fasted before sterilization. The dog should be fasted for at least 12 hours to reduce the risk of anesthesia. After a week, it can be carried out at the pet hospital. Remove stitches. Female dogs are a little more complicated than male dogs and need to be hospitalized for about three days. Female dogs need surgery to remove their ovaries, so it is very normal to be hospitalized for three days to about a week. Most dogs may become obese after neutering. It is recommended that owners feed their pets some special sterilized prescription food to reduce the problem of dog obesity and reduce the energy intake of old dog food.