WASHINGTON -- Pet owners are really worried. Millions of containers of dog and cat food sold at major retailers across North America have been recalled.

• Recall: Dog Products | Cat Products

Menu Foods said it's recalling dog food sold under 48 brands and cat food sold under 40 brands, including Iams, Nutro and Eukanuba.

One New Jersey woman became concerned when the four types of Iams products she buys for her cat, Smokey, had vanished from shelves. She said Smokey is very sick and hasn't been eating for days.

In Nebraska, another woman said she sometimes feeds her five cats packets of sliced meat and gravy sold by one of the brands affected. She said her cat, Boots, seems to have lost its appetite in the last few days.

The company said an unknown number of animals have suffered kidney failure and about 10 died after eating the affected pet food.

The Food and Drug Administration warned pet owners of the massive recall. Menu Foods Inc. ., is recalling 60 million containers of wet pet food.

The Canadian-based manufacturer is recalling all its "cuts and gravy" style dog and cat food produced between Dec. 3 and March 6. The company distributes the products to numerous retailers in the form of cans and pouches and under different brand names.

The products are sold at stores including Wal-Mart, PetSmart, Pet Valu and Kroger.

Officials are warning pet owners to immediately stop feeding the contaminated foods to their pets and said owners should see their pets' veterinarians if they develop signs of kidney failure, including loss of appetite, vomiting or lethargy. The company said they have conducted tests, but are so far unable to locate the source of the contamination.

A complete list of the recalled products along with product codes, descriptions and production dates is available from the Menu Foods Web site at menufoods.com.