I've been researching breeding and all the related topics quite a bit that last year or two - wanted to answer questions I had before I made any decision on Khana and breeding her. I've read as many of Dr. Hutchinson's seminars as I could find. He seems to be one of the leading canine reproduction specialists currently.
From what I understand in reading his seminars is that he encourages breeders to breed bitches early and explains in detail that progesterone (released during estrus - heat cycles) really hammers the uterus and causes deterioration every cycle. He indicates that it's actually healthier for a HEALTHY bitch to be bred back to back cycles than to skip a cycle. I haven't seen him advocate breeding EVERY cycle, but if you were going to breed a bitch a couple of times he feels that it would be better to breed her back to back and then spay her, than to breed her, wait a year or two and breed her again. I think he said in one seminar (maybe more than one) that the uterus actually is more damaged going through a heat cycle than it is going through pregnancy.
But I also remember reading about breeding older bitches (let's call "older" from 4-7) and the consensus was that breeding an older bitch wasn't bad, it just wasn't a great idea if it was her first litter. Considering that the uterus, at that point, had probably been through 8 or more heat cycles, there could be considerable degeneration already. I'm pretty sure that Dr. Hutchinson said that a bitch that was bred fairly regularly (as long as she was healthy otherwise, of course) could usually be bred as an older bitch without having many problems. It's the maiden bitches that tend toward problems.
I don't think he was advocating breeding before health certifications or before a bitch is fully grown, and he wasn't advocating continual breeding of a bitch either. He recommended that if you weren't going to breed your bitch for a few cycles to put her on Cheque Drops (mibolerone). Trouble is, mibolerone is difficult to get as it's a steroid and is used illegally by bodybuilders. But he praised it as a means of stopping estrus in a bitch and protecting the uterus from the effects of progesterone during non-breeding times.
To the orginal poster's question: if a bitch is less than two years old and is on her second litter, the likelihoods that this breeder did any real testing is probably slim. OFA certifications for hips and elbows can't be done until age two. As explained, preliminaries can be done and other organizations may do hip and elbow certifications earlier than two years, but there are other health certifications as well as proving a dog with working certifications or show/working titles. This all takes time. Breeders who emphasize health are generally very straight-forward in their proof of health certifications .. they offer the OFA numbers or copies of the certificates with little or no request from potential puppy buyers (or anyone else who wants to know).
Time's slippin' away on my girl - she's three now and I am probably not going to breed her, so I'm considering having her spayed. Been through pyometra with one bitch, don't want to have it happen to another.
Melanie and the gang in Alaska