Check the labels on your dogs food! There is another voluntary recall for salmonella. This time the contamination happened at Midwestern Pet Foods' plant in Monmouth, Illinois, and it affects more than 50 brands. You can find a full list of the affected items on the FDA's website. Click Here .The salmonella was discovered through routine testing, and there have been no reports of illness. Symptoms in pets include lethargy, diarrhea and decreased appetite.