6 
Colorado Experiment Station. 
considered to be due to a greater degree of infection. There is a greater 
toxemia. Dogs with this type usually die in from 3 to 4 days after 
the symptoms have fully developed. 
Symptoms. 
The first symptoms noted will be a change in the disposition. The 
kind playful dog will become morose, fretful, and easily excited. In 
these earlier stages, if running at large, he may pick up and swallow 
sticks, hair, and even stones. There is a tendency to lick and gnaw 
the point at which lie was bitten. This part may itch and possibly cause 
pain. He is prone to crawl under the porch or other place and hide a 
part of the time, coming out to eat and again seeking seclusion. At 
this stage he may leave home and bite men and animals that chance to 
come his way. He may return home after several hours in an ex¬ 
hausted state or he may never return. The jaw drops from paralysis 
and the owner thinks the dog has a bone in his throat. He eats and 
drinks with difficulty or not at all, owing to the partial or complete 
paralysis of the throat. He may bark but his bark is drawn out into 
a long howl. This howl, if once heard, will never be forgotten. The 
dog may still know his master but has a tendency to try and bite or 
attack any one he does not know. Later he does not even recognize 
his master. If in a cage lie will bite or snap at any stick poked at him. 
If tied he will try to chew the rope and free himself. The ears may 
be erect and trembly. The dog is ever alert to any noise, and is always 
disturbed by it. He stares, his eyes at first moist later become dry. 
This is due to the cessation of the tear secretion. Finally he becomes 
paralized, first in the hind quarters, then in the fore, and death ends 
his suffering. Oftentimes the tongue is protruded and more or less 
paralized and as a result of exposure to the atmosphere is oftimes dry 
and black. Figure 1, shows a photograph of a dog with dumb rabies. 
furious Rabies. 
In furious rabies the animal is more irritable than in the dumb 
form. There is a greater tendency to bite. The jaw is not dropped 
or paralized until the very last stages. In the furious type the dog 
may live from six to eight days after the symptoms are well developed. 
Horses and cattle more often develop the furious type. The writer 
has seen a case in the horse, in which an ordinary box stall was not 
strong enough to hold the animal, so furious was he in his spasms. The 
horse makes violent efforts to bite or attack, the cow more often tries to 
butt any animal or person that comes near. 
Post Mortem Findings. 
The dog, or any animal, to be sent to the laboratory should not 
be shot through the brain, as that lacerates the brain and causes hem¬ 
orrhages into its substances. This greatly interferes with a detailed 
examination. The proper, and one of the most humane ways, is to 
shoot the dog or other animal through the heart. The head should be 
cut off in such manner that three or four inches of the neck remains 
with the head. This enables the securing of the nerve centers for mi- 
