Can a Dog Still Go Into Heat After Being Spayed?

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Yes, it is possible for a dog to go into heat if she has been spayed. This is only true if the dog had her tubes tied versus having a whole ovariohysterectomy, which removes all of the female reproductive organs.

A female dog is traditionally spayed by a licensed veterinarian when she is between the ages of 2 and 6 months. The average age for a spay is 4 months. It is common to remove both the uterus and the ovaries during this operation. Spaying a female dog helps to prevent unwanted pregnancies. Spaying is also useful for preventing ovarian and breast cancer.