Though The Business Press Maven's whole paycheck goes to Whole Foods ( WFMI), he was unfortunately too obtuse to invest in the stock. The lofty margins for what is in the end just a grocer scared me off. (I know, I know, it's so much more than a grocer -- it's even kind to lobsters -- puh-lease, spare me the email. Besides, I'm busy reading more today on how wrong I've been.) But the question of whether there is more money to be made in Whole Foods or whether the Johnny-come-lately competition from Wal-Mart ( WMT), Safeway ( SWY), Kroger ( KR), SuperValu ( SVU) and others, plus the ongoing confusion over just what is meant by the term "organic," might finally take a big lobster claw to those vaunted margins is becoming more timely. First, the strength: Writing late Thursday , Libby Quaid, an Associated Press Farm and Food writer, touched on current growth rates. ( Editor's note: To access some of these stories, registration or a subscription may be required. Please check the individual links for the site's policy.) They made me want to cry in my chemical-enriched milk (I'm allowed my small pleasures). Conventional food sales, which are sleep-inducing, plug along in the low single-digits, and there is growth in organic foods. The segment has been growing at a 15% to 20% clip, and because it makes up only a tiny portion of the nation's food, perhaps there is room for growth. But Quaid touches on some emerging struggles to get organic food supplies. You think oil can be a complicated import? Try getting milk powder from New Zealand or suitably certified goods from South America. The Motley Fool has a good primer on the same problem, and touches on the dilemma of brands like Horizon (owned by Dean's Foods ( DF)), which has been accused of acting like a factory farm. A big part of the debate for the food segment is whether "organic" means simply keeping antibiotics and hormones out of feed or whether it includes welfare factors, like giving large animals more than two inches of space to graze in. Anyhow, torrents of new competitors, industry supply problems and basic debates over common product definitions are hardly automatic positives for a business like Whole Foods, one whose margins have a long way to fall. But shorts beware: I have been wrong on this stock from the start.