If you have A+ Answers Straight Beef Formula for Dogs from Lot 2018 20/08 20, federal health officials are telling you to throw it away in a secure container where other animals, including wildlife, cannot access it.
The company that owns the brand has recalled the affected lot in Nebraska, but has not implemented a nationwide recall.

Pet foods contaminated with pathogens such as Salmonella are of particular public health importance because they can affect both human and animal health. Pets can get sick from Salmonella, and may also be carriers of the bacteria and pass it onto their human companions without appearing to be ill, according to FDA.
Once Salmonella gets established in the pet’s gastrointestinal tract, the animal can shed the bacteria when it has a bowel movement and the contamination will continue to spread, resulting in food poisoning and infection in humans.
Federal law requires all pet food to be free of pathogens, including Salmonella.
For more information, please visit this page on FDA’s website.