Are your saying that this stock is a PO Petersen's S or that Petersen is a POS? Your not making any sense. Could you please clarify.
I don't think it is possible for a stock to be an actual partical of fecal, however Petersen himself may have actual been formed due to some strange synthesis of materials found in a septic tank that was exposed to some bizzare radiation. These septic materials would have more likely than not included a POS.