[HisNameIsHarley]

There is mixed controversy between old and new vets whether it is best to spay before or after their first heat. But new information has proved that if you let your dog go through her first heat before spaying her, she has a 50% chance of developing breast cancer later in life. Yikes! I work for the NHES and help run the Spay Today program at Briggs where we're located and only one out of our ten vets recommends to spay after their first heat.(he is widely reffered to as an 'old' vet) 6 months is usually the ideal age to have your female spayed and since it is now known that it is beneficial to their future health I would go ahead and have her done before she goes into heat. IMO.