I am typing with a broke wrist, that is how important this topic is to me.
Pediatric spay and neuter has been done in cats for a very long time with very high success. There are many studies, that show that the benefits far outweigh the risks.
We spay and neuter our kittens at 11 weeks old, and the cut off for our vet is 2lbs as well, but our kittens are usually a little larger. I have researched the anesthesia's used, and have spoke to my vet as well and we feel comfortable with the type of anesthetic he uses. We have never had a problem with any of our kittens to date. They are playing the same day as the surgery was performed, and seem like nothing happened. The incision is much smaller as well.
It will become more and more common to see vets perform pediatric altering. I agree that a vet who says 6 months or older before altering, isn't up to date on the research for pediatric altering.http://www.winnfelinehealth.org//hea...ay-neuter.html
Here is a report done on early altering from Winn Feline as well.http://www.winnfelinehealth.org//rep...ly-neuter.html
I also would like to say that we have 2 males who were early altered, they are now ages 6 and 4, and neither have had any health issues.
It is my opinion, that breeders, rescue organizations, and pet owners should take on the responsibility in getting cats and dogs altered early. I do believe it is best for the animal, as well as helping with overpopulation. Cats can and do get pregnant at 6 months old, as well as males are able to impregnante at that age and younger, altering by the 4 month mark can aleviate that.
I have a post in the breeders section regarding vet referrals. I have been busy with many different things, and haven't had the chance to put a lot of time into it yet, but I am still hoping to get it going soon.