shares of maple leaf foods inc tumbled in early trading thursday after the company swung to a loss and generated less revenue in the second quarter as inflation and labor issues weighed on the company at 942 am et shares were trading nearly 17 lower at c2243 the canadian consumer packaged meats company reported a loss of 44 canadian cents a share 34 us cents compared with a profit of c007 a share in the comparable quarter a year earlier on an adjusted basis pershare earnings were flat missing analyst expectations for a profit of c026 a share