We recommend spaying your pets, which is the removal of the ovaries and uterus. This helps decrease different kinds of health issues including decreasing likelihood of breast cancer, prevention of pyometra (life threating infection of the uterus), and unintended pregnancies. For cats we recommend spaying between 3-6 months and they must weigh 3 pounds. For dogs we recommend 4-6 months for dogs at a mature weight under 50 pounds and 1 year for dogs over 50 pounds.