One of the shelters you work with has called for your advice…

One of the shelters you work with has called for your advice following an outbreak in their cats. 3 of their 20 kittens (2 litter affected) same down with a respiratory infection (URI). These kittens have runny noses, congestion, and are refusing to eat. They also have ulcers on their tongues. Presumptively, these kittens are affected by feline calicivirus. As you go to offer sage, doctorly advice, the shelter staff let you know the kittens are responding well to your viral URI protocol. “Trouble is,” the employee admits, “I’m not sure what disinfectant you wanted us to use here.” Mortified by your oversight, you tell them:

Salmonella enterica can cause serious disease in many animal…

Salmonella enterica can cause serious disease in many animal species, and herd outbreaks of disease leading to the death of several animals can sometimes be attributed to Salmonella.  Which situation would be most likely to predispose animals to Salmonella infection?