Sharon, Blaise and Diesel.
5 mo old Tango (and a couple other pups I've kept) have had recessed vulvas. Tango's is improving even now (though she'll stay intact anyhow). I've never had a problem to be honest.
I think many vets are too quick to jump at early spay surgeries, and in the process, cost the owners (and dog) far more in the end. Please do your homework.
Go back to page one and click on my blog in my post (Heart Pet) for all the info you need on natural means of preventing UTIs.
I know many dogs with RVs already spayed prior to first heat (unfortunately) that are UTI free from following my method.
With all the people I have helped I have only seen one dog that needed the surgery. But is was the most unbelievable (worse case) RV I have ever seen - vet said the same.
Feel free to post on my blog or email me for any help you need.