I agree we should all do what is right for us and our dogs, there is no right answer, but the more information we have when deciding what to do the better. And yes, the difference in risk re. the bones is small too, but decreased bone density, however slight, is more likely after early spaying than cancer is after delayed spaying, unless the spaying is delayed beyond I think it's 36 mths.It is worth pointing out also that the difference( and there certainly isn't sufficient evidence that this is a certainty) between bone density of early spayed animals and those spayed later is also very small so much like the argument about cancer,the difference is minimal.Ok, I've only scanned this thread so apologies if the point I'm making is already covered. Also I do have the stats from the vet literature to support this but as I'm waiting on a phone call from the vet having just rushed Tolly in as an emergency I'm not going to go and seach them out just now.
The risk of cancer increases the longer a dog is left unspayed but the difference in risk after one or two seasons is small. If all bitches were left unspayed mammary cancer would still only occur in a relatively small number, so by delaying spaying and allowing the dog to have a season or two you only marginally increase what is already a smallish risk. You also allow the dog time to mature emotionally and physically, and this includes time for the growth plates in the long bones of the legs to close as and when they should, a process that is in some part hormone driven. Dogs spayed whilst still immature can have reduced bone density which can mean a life long higher risk of injury etc., particularly for a sighthound/running dog. The risk posed to the bones by early spaying (or castrating) is greater than the increase in cancer risk if spaying is delayed until 18-24 mths.
HTH
Annie
Our boxer bitch is both emotionally and definitely physically( ours is certainly far more muscular and less puppy looking) no different to our friends boxer who was allowed two seasons before spaying.
we all just do what's right for our own animals.
Annie (who's off to get a patched up Tolly).