Will my small breed puppy not be healthy since she was spayed at 8 weeks?

My puppy’s breeder spays/neuters all of their puppies before the babies go to their new homes. They have a reputable vet who is very knowledgeable with juvenile spay/neuter. Their puppy’s have never had any complications from the early altering, and are happy and healthy.

My was concerned with it, and stated that because of this my puppy will have some serious issues with her urinary tract when she gets older. I was able to locate a web site that had some information regarding that. They say that ovariohysterectomized females may be prone to urinary incontinence. Vulvar in-folding occurs in females spayed prepubertally that maintains an infantile vulva to a more infantile form. There is no evidence to support a hypothesis that age at gonadectomy would affect onset or progression of either problem.

It also said that currently available information indicates that early spay and neuter is a safe procedure. I know that early spay or neuter surgery is quick, qith minimal bleeding and quick recovery. I guess my concern is just the welfare of my puppy. I am just wanting her for a pet, nothing more – just to join my family and become a loved member who I can spoil and pamper. She is a Chihuahua, and both of her parents are in great health. The breeder is very responsible – her dogs are all in her home, and are well taken care of.

She is current on her shots, spayed, and micro-chipped too. I am just leery that I am going to be taking home a constant vet bill/worry… and will be dealing with urinary tract problems through out her life. I would be sad to forfeit my deposit and not adopt her… but I just want a healthy puppy.

Any input would be appreciated.
The puppy is almost 10 weeks and her spay scar is now completely healed. It was much smaller many spay scars I’ve seen – it looks rather like a dot than an actual incision.

I do not have the puppy yet, as I’m concerned she’ll have problems with urinary tract issues – which is what my vet said…