The Procter & Gamble Company (P&G) is voluntarily recalling specific lots of its "Iams" canned cat food in North America as a precautionary measure. Diagnostic testing indicated that the product may contain insufficient levels of thiamine (Vitamin B1), which is essential for cats. Cats that were fed these canned products as their only food are at greater risk of developing signs of thiamine deficiency. The recall includes "Iams ProActive Health canned Cat and Kitten Food", all varieties of 3 oz and 5.5 oz cans (Date on bottom of can: 09/2011 to 06/2012). This recall is limited to only Iams canned cat food distributed in North America. No other Iams pet food is involved, the company states. Consumers who have purchased canned cat food with these codes should discard it.