ON POULTRY LOUSINESS IN THE HORSE. 
225 
First Observation. 
In 1842, an old iron-dealer brought a pony to the Alfort 
College for treatment for a disease of the skin, whose coat was 
spotted all over with circular bare patches, confluent in some 
parts, particularly about the head and neck and back, and 
whose itching caused by the disorder was such that the animal 
could get no rest. The owner said that he had but lately 
bought the pony, that the itching and depilation had taken 
place a few days after it came into his possession, and that when 
first he had him his coat was perfect and blooming, without the 
slightest trace of what now appeared. 
At the time, the disease was regarded as general mange, and 
treated by baths, alkaline and sulphurous lotions, and mercurial 
frictions. In a few days the itching was allayed and the pony 
sent home. 
Scarcely, however, had twenty-four hours elapsed when the 
itching returned more violently than ever, and the pony was 
in consequence brought for treatment again ; and, in order that 
this time such treatment might prove permanently curable, it 
was left at the Veterinary College for a fortnight. All ex- 
pression of itchiness having subsided, the pony departed a 
second time ; but two days had not elapsed, when the itching 
returned, and the animal manifested the same disposition to tear 
himself with his teeth as he did before. w It now became more 
desirable to know how it was these relapses always accom- 
panied his return to Paris. Inquiry shewed that the animal 
was lodged in a narrow, obscure, low stall, under a hen-roost , 
from which it was partitioned by some loose planking, through 
the crevices of which the dust from the roost fell upon the 
p° n y* 
This led to a supposition that what we had considered to be 
mange, might be occasioned by the proximity of the hen-roost. 
It was recommended either that the pony be removed, or its 
stall thoroughly cleaned out, and the roost got rid of. The latter 
recommendation was attended to, and no return of the affection 
has since been reported. 
We might relate many other similar cases occurring in times 
back; but shall rest content on the present occasion with giv- 
ing such as have happened within these last two years. 
Second Observation. 
A mare was brought to the College in December 1849, on 
account of general itchings which had for some length of time 
tormented her so, that she could not in peace eat her feeds. 
