My vet told me to come in at six months? should I wait longer also or should I go ahead and get it done this early?...sorry for butting in on your q but it's been on my mind also
This Lab site (below) has a very detailed discussion of early spaying and its effects on growth plate closure, smooth muscle mass development, UTI tendencies, pyometra, cancers (not just reproductive cancers), and more. Those are just a few of a dozen or more items on both sides of the question of early neutering.
It's a Labrador site, but the discussion is general. It's well-referenced, very detailed, and balanced (IMO), presenting more than one vet researcher's point of view.
http://p075.ezboard.com/fjustlabradors41940frm6.showMessage?topicID=5192.topic
It's the 7th post on the page; scroll to this citation: "From "Gonadectomy in immature dogs Effects on skeletal, physical and behavioral development", JAVMA April 1, 1991, Vol. 198 No 7, Salmeri et al. pp 1193-1203."
The poster references many published papers, and I followed up on three of them just to make sure the poster was quoting accurately and that the sources were indeed authoritative.
Many vet sites (if they discuss the optimal age at all) state that it's a balancing act between the fact that each estrus experienced increases the risk of mammary cancer by significant percentages and the indications that early spaying contributes to UTIs and what is called "spay incontinence" in many breeds. Of course, there are several other factors, too.
My personal viewpoint is affected by work with shelters and seeing what the addition every year of millions (yes, millions) of unwanted dogs to the US dog population does to the chances of unplanned puppies finding homes. (4.5 million dogs and cats are euthanized in U.S. shelters every year.)
So I have read everything I could find about the possible DISadvantages of early spaying in order to balance what would otherwise be (I admit) a knee-jerk reaction to leaving bitches intact. (Obviously, I mean those not part of a serious breeding program.)
Some of what I've read is this: If the owner is 100% able to prevent any possibility of an unplanned pregnancy, then some vets contend that, all things considered and the pros and cons weighed, seven months to one year might be a good age to choose for spaying.
This is a really good subject for a detailed discussion with the vet, I think.
Some discussions:
http://72.14.203.104/search?q=cache:xWfa7meCaXcJ:www.tica.org/pdf/earlyspayneuter1.pdf
(Scroll to Page 2.)
http://www.ncbi.nlm.nih.gov/entrez/query...p;dopt=Abstract
http://www.dpca-breedered.com/spaying_castration.htm
http://www.labbies.com/neuter.htm
I'm not a health professional. I'm just pointing out some info I've found helpful.