I have a female Great Dane that is currently a few weeks over 6 months old. I have an appointment to get her spayed for next week. My vet recommended spaying her because she could go into heat at anytime. And he says after they go through their first heat cycle there is 80% more of a chance they could get breast cancer.

But I was talking to another lady that has great danes and she says that a great dane does not come into heat till they are 12 months and that I shouldn't spay her so soon because she isn't developed yet. Any suggestions??? Please help!!!