Should I wait to spay my dog?

A recent study showed that Rotties spayed before a year have a 1 in 4 chance of bone Sarcoma. Breeders say to delay spay of giant breeds until the dog turns 1. I don't really want to go through heat with a giant breed dog ever again. But I want to do what is best for my dog. Spay now, or in a few months?

  • Vetinfo

    By: Kara McCarty El Segundo, CA

    Replied on 04/19/2011

    The study you are talking about was faulty in its design. What the study didn't tell you is that spayed females lived longer than unspayed females. Of course dogs that live longer have a higher chance of bone cancer because they are around longer to get cancer. The unspayed females died of things like mammary cancer, which is almost completely preventable by spaying before their first heat. In fact unspayed females have 8 times the risk of mammary cancer compared to females spayed before their first heat. Unspayed females also died of a pyometra (infected uterus) at a much higher rate (because spayed females don't have a uterus to get infected) and therefore died at a younger age. Other various problems like roaming to find a male, fighting and ovarian cancer are obviously less in a spayed female. I would spay your dog before her first heat.

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