Sunny is 6 months. She will be 7 months on the 16th. When do females first come in heat? Our vet wants us to have her spayed right before the first one. He says he reduces the risk of breast cancer. The breeder prefers if you want a year. He says the dogs will become"leggy" if not. As I am not going to be showing I think the risk is greater to wait. Any different thoughts?