It’s a difficult one. There is evidence that the chance of mammary cancer is greatly reduced the earlier a bitch is spayed; once she has gone through two seasons, there is no benefit in this respect. And a bitch left unspayed has a one in four chance of suffering from pyometra over the course of her life. It can make it seem like a no-brainer to have a bitch spayed, but it’s not as simple as that. There are risks which are increased with spaying, too. And you can’t just look at the percentage that the risk goes up, you have to take the original risk into account as well. If there is a 0.5% chance of getting a condition pre-spay and that risk is doubled, it’s still only 1%.
I had Willow spayed before her first season, and regret that. I thought I was doing the best thing at the time, but now I wouldn’t do it before maturity. Squidge went through two seasons before she was spayed, and I was still very conflicted as to whether it was the right thing to do or not. Her seasons didn’t bother her, but the timing of them didn’t work well for us to be able to keep her and Shadow apart, so he either needed to be neutered or chemically castrated if we were to keep her entire. The best course of action seemed to be to spay her.
But I hated that decision and even now it makes me very uncomfortable. She’s totally fine and I can’t say it’s not easier, but it still feels wrong to me, that I would put her through a surgery to change her body in such a dramatic way.
Most people don’t think twice about it, and their dogs are absolutely fine. For others, it’s life-saving, as their dogs already have pyometra, whether the owners are aware or not.
At the end of the day, it’s a very personal decision and one that doesn’t have a single right answer.