Pets

If it's a pyometra (infected uterus) it can be very expensive because the surgery is more invasive and the risk of complications is greater. Once you have additional factors, whether the dog is in heat, pregnant, there is cancer, or there is a pyometra then prices increase. Remember these are doctors. They have a team of trained staff (not allowed to call vet techs nurses, but they are that and beyond). They are using human grade anesthesia, medications, and lab procedures at a very tiny fraction of the cost as you'd find in a human hospital.