I don't think Kathi mentioned this, but the mare died after giving birth to the filly in question (within a month +/-), so the filly was orphaned. The mare was going permanent last year, so the DNA request had not been sent in to AMHA yet.
The mare was a maiden. There are many 1/2 sibs to the fiilly from the sire (the sire is DNA tested). There are also aunts, father and her grandmother still alive from her dams side, and Kathi owns the mare's grandsire, which I think could show genetically there are similarities, at least enough to verifiy the filly is a potential foal from the deceased mare.
The mare was known to the vet and under vet care from the day the filly was born, until the final day of the mares life, so the vet has knowledge that the foal was from this specific mare (she was an orphaned foal after her dam died too), but AMHA won't accept this as it is not 'DNA'.
There really isn't a way to account for these issues with AMHA and apparently, none of this is acceptable DNA proof to AMHA. There doesn't seem to be a way around this requirement short of hardshipping this filly when she turns five (which will show her having no pedigree vs the seven generations deep 95+ registered minis in her pedigree right now!
The breeder/owner of the mare is someone I did business with and have felt the repercussions (late stallion reports, DNA issues, holding paperwork, incomplete paperwork, etc) - I definitely learned the hard way with her! As well as her bad mouthing me and others to anyone that will listen.
She has the hair as she routinely pulls hair on all horses she owns if they are leased, travel, etc., so she has the hair in her files (there were witnesses to her pulling the hair as well), she just won't give it to Kathi as that is the kind of person she is and she knows Kathi has a filly that isn't registerable.
Unfortunately, I don't believe AMHA has a way to handle complaints against some of the more unsavory breeders out there or a way to make them perform.