tropic Sure thing.
So the biggest factor affecting the decision of when to spey either before or after the first season (=total removal of ovaries and uterus here in the UK) is the healthof the patient. If the patient is underweight or otherwise unwell, neutering before the first season (usually done around 6months) is postponed. So provided your pup is healthy and otherwise well, she could theoretically be spayed at any age. Historically early speying was risky because of anaesthetic risks but nowadays our anaesthetic drugs, protocols and monitoring are vastly improved and therefore risk associated with anaesthetic for elective procedures (so operations we chose to perform like speying etc) is much safer.
In terms of early speying (so before first season) or late (three months after first season) and disease causation vs prevention, the breed of the patient of the patient has a big influence on what risks early vs late neutering might pose to your dog.
There have been many MANY studies done on this subject and there are always arguments for and against: so for example a study on Rottweilers showed NO difference in the likelihood of bone cancer between neutered and intact (or entire) individuals. However the same study went on to show that bitches that we’re neutered before their first season, were
more likely to develop osteosarcoma (bone cancer) than bitches spayed earlier. However in this breed early neutering increases life span so these bitches also lived longer (so in this study early neutering was shown to increase life expectancy in this breed)
So for Rotties, early neutering may mean a longer life but an increased risk of osteosarcoma.
Other types of cancer like mast cell tumours for which Labradors can be prone to, appear to be more frequent in patients neutered later. This also applies for mammary tumours. There are many more types of diseases that studies have shown to be caused or prevented by neutering (vaginal tumours, urinary incontinence, senile dementia and cognitive disorders) but nothing conclusive which enables us as a profession to chose one over the other.
Another important thing that influences the owner and veterinary surgeon’s choice to spey before or after the 1st season is the pup’s home environment. Obviously speying is intended to render the patient infertile and if there are entire males at home
that will go bonkers when a bitch is on heat, then it makes sense to spey before that first season, as well as making sure there are no unwanted litters. (I had a male dog present with a jaw fracture from chewing through a fence to get to a female on heat!)
Another reason that I prefer to spey earlier (so definitely before the second season and ideally before the first where appropriate) and this depends on your vet,
is that I find the surgical procedure is less complicated the younger they are. The blood vessels are smaller, the blood loss is less, the uterus and ovaries are smaller as the patient is still juvenile and typically the surgical wound is small, the procedure and subsequent recovery are quicker and they seem to bounce back rapidly with the right care.
In some cases, the pups also have retained baby teeth that can cause tooth decay and malformed bites, and 6months is a very good time to remove them so the erupting adult teeth aren’t damaged when they come through.
So there are loads of factors to be thought about. Ones I haven’t mentioned are things like obesity (huge HUGE problem amongst our pets), pyometra incidences, problems with pregnancies and C-sections etc as all of these are discussions to be had when considering whether to spey or not, and not when the only consideration in “when” to spey rather than if. As I’ve understood it you’re set on speying, but just not sure on when?
All in all, if your puppy was a patient where I practice, we’d recommend early neutering. But!! If I were you, OP, I’d speak to your vet, or if you haven’t found a vet yet go and look around some practices, find a RCVS accredited one that you like, with vets you like and more
importantly trust, and take their advice.
Sorry this has been the longest post ever, have been trying to settle 7m DD whilst writing so apologies if it’s a bit disjointed! Hope that helps tropic and OP. And congratulations on your new puppy OP. Whippets are just amazing! Nicest little dogs with the funkiest characters!