The phrase "rabid animals" refers to wild or domestic animals that have been infected with a disease called rabies. Rabies is a virus that affects the brain of animals, making them aggressive, foaming at the mouth, and extremely dangerous.
Humans (Possibly) Exposed to Rabies «More than 2,000 people were exposed to rabid or potentially rabid animals in Florida in 2010,» explains HAHF. (voxfelina.com)
Because rabies is fatal — to both animals and humans that are bitten by rabid animals — the rabies vaccination is required by law in many states. (galenasquarevetclinic.com)