Spay or neuter your pets. Cute as they may be, the world doesn't need more puppies.
Don't spay or neuter your dog, unless it's running wild outside. Spaying usually leads to undesirable weight gain, which in itself can cause or exacerbate diabetes, heart disease and arthritis.
Spayed bitches are more likely to suffer from urinary incontinence in old age.
Also, with every general anesthetic there is a risk of death. Would spay your daughter?