~Alexandrine Parakeet~2 Red Lored Amazons~Blue Fronted Amazon~Black capped conure~4 Green Cheeks~4 Parrotlets~2 lineolated parakeets~9 American budgies~9 English budgies~ And lots of babies :)
I also used Avian Biotech just a month ago or so, they were very fast, cheap $20 and I could see results as soon as they were done on their website plus the certificate that came in the mail.
Alex was done by 'DNA Solutions' by his breeder. I have a DNA sexing cert for him. I assume since we are in Aus though, that it is an Aus company, and I have no personal experience with them. They seem to be the place of choice around here for sexing though!
If uncontaminated feathers are used, they just as good. DNA is DNA, wherever you source it from. Admittedly, feathers are much easier to contaminate then a blood sample, but with adequate care, I don't see a difference.
DNA sexing isn't 100% accurate regardless of the sample taken. Their will always be the few who get wrong results, whether due to contamination, chimaerism (some cells of the opposite sex in a creature, due to merging twins in the egg), other abnormalities, or lab issues. Blood testing can and is wrong sometimes (and at a rate comparable to feather or shell testing) too.
Interesting note, you can also send in hatched shells and the fluid remant from hatching can be used to test.
Senegal Parrot named "Kane"; Yellow-Sided Green Cheek Conure named "Bowie"; Blue Quaker Parrot named "Lita Ford"; Cockatiel named "Duff"; 8 American/English Budgie Hybrids; Ringneck Dove named "Dylan"
Avian Biotech is pretty reliable, I've used them many times as well...Just make sure that you pluck fresh feathers out of your bird's chest, and that you send a few and not just one.
Feather DNA-testing is extremely reliable, but you have to make sure that you send fresh feathers that were just plucked, and you send more than one to them, because what happens is if you only send one feather it may not have any genetic material on it to properly test (just like pulling a person's hair to DNA-test or Drug-test, etc., but without the root attached)...If it's not freshly-plucked there won't be any material to properly test, and if you only send one freshly-plucked feather and it doesn't have any genetic-material attached and they test it, depending on what method they use to actually process the test after the PCR is run, sometimes they actually ALL come back as female, because all mammals are female to start out, and they only turn into males when the Y-chromosome is added. I have actually done human sex-testing using gel-electrophoresis/PCR in college/grad school labs, and we tested ourselves, and some males came back as being female on the computer system they were using to do the control tests, and it's just because they didn't have a full root on the hair that they pulled...
Otherwise, hair/fur/feather DNA-testing is just as reliable as blood DNA-testing is, they use exactly the same test that they use on the hair/fur/feather test, it's just the preparation of the sample that differs, and in blood you're always going to have the correct genetic material you need to be accurate. But if you pluck fresh feathers and send 3-4 of them, the test will be accurate.