Merrick Pet Care, Inc. has announced a voluntary recall for a variety of beef dog treats due to concerns they may contain elevated levels of a naturally-occurring beef thyroid hormone, according to a Recall Notice issued Wednesday by the U.S. Food & Drug Administration (FDA).

Dogs that consume high levels of beef thyroid hormone may exhibit the following symptoms:

• Increased thirst/urination
• Weight loss
• Increased heart rate
• Restlessness

If a dog consumes high levels of the hormone for extended periods of time, these symptoms may increase in severity and also include vomiting, diarrhea, and rapid or labored breathing.

If your pet has exhibited any of the above symptoms after eating the following beef treats, stop feeding them and contact your veterinarian immediately:

• Castor & Pollux Good Buddy Prime Patties Real Beef Recipe 4 oz., UPC 780872510806
• Castor & Pollux Good Buddy Sausage Cuts Real Beef Recipe 5 oz., UPC 780872510745
• Merrick Backcountry Great Plains Real Beef Jerky 4.5 oz., UPC 022808786160
• Merrick Backcountry Great Plains Real Beef Sausage Cuts 5 oz., UPC 022808786047
• Merrick Backcountry Great Plains Real Steak Patties 4 oz., UPC 022808786078

Production codes can be located on the lower back of the treat bag, FDA said. The treats were distributed nationwide through pet specialty, grocery and online retailers. No other Merrick pet food products are affected by the recall.

Source: U.S. Food & Drug Administration (FDA)