There are certainly ways to completely exclude SH's explanations, but they would require basic research into other aspects of the boar's steroid profiles. I imagine they are not wildly different than human pathways. You would need some unique boar metabolites and show that they were present in SH urine and had the same higher isotope ratio than her own steroid metabolites. It would probably cost more than SH would have made during the rest of her career. But Nike may have done so for Jordan or Tiger if they had faced some kind of doping suspension.