OSTEOPOROSIS. 
33 
2d. What proportion of cases have been aged and what 
young animals? 
3d. Were the animals stabled? If so, please give details 
as to ventilation, drainage, dampness, character of food and 
water. If on pasture, please state character of pasture, 
whether dry or marshy, and kind of grass and water. 
4th. At what age have you generally seen the disease, 
and in your opinion what is the cause of the disease in the 
cases you have seen ? 
5th. What line of treatment do you find best? 
6th. What percentage of recoveries ? 
7th. The uncertainty of our knowledge regarding this 
disease makes it more than interesting. Kindly send such in¬ 
formation as you may have upon the peculiarities of its 
appearance in your locality. 
Replying to these, Dr. Harbaugh says : 
1st. Osteoporosis is met with in the range of my practice 
to a greater or less extent every year, but some seasons it ap¬ 
pears in enzootic form, when the number of cases diagnosed 
increases the average to a great extent. I have only a limited 
knowledge of the disease elsewhere in the State, but from 
different persons I learn that it is by no means confined to 
this vicinity. 
2d. According to my observations, the disease attacks 
old and young horses alike. In one stable where all the 
horses were over six years old, nine horses contracted the 
disease within a period of six months. In another stable, 
where all the animals were young, two two-year-olds and 
three three-year-olds were markedly diseased, and some, both 
older and younger, showed no symptoms whatever. 
3d. In all my experience the affected animals were 
stabled. While it is true that some of the animals were 
turned out to graze or exercise during the day, and that the 
affected city horses were out in the air daily, at their accus¬ 
tomed work, still all were stabled at night. 
In every instance the stable was more or less damp and 
lacked proper ventilation, drainage and light. 
In no case could I justly find fault with food and water. 
