Dog with Rabies; photo courtesy of the CDC, source: Wikimedia Commons
Close-up of a dog's face during late-stage "dumb" paralytic rabies. Animals with "dumb" rabies appear depressed, lethargic, and uncoordinated. Gradually they become completely paralyzed. When their throat and jaw muscles are paralyzed, the animals will drool and have difficulty swallowing.
Photo in the public domain - downloaded from Wikimedia Commons April 18, 2013 –