Define perfect husbandry?? do you regularly check hot and cold side temps? I know of people who have varying sized tubs in their racks and dont realize bigger thicker tubs with 90 degree hotspots result in smaller thinner tubs with hotspots of 95+ if they are all mixed size on a rack....I've NEVER heard of issues with any pinstripes before....are your meals too big? have you tried F/T, fresh killed, live? ASFs?