226 The Diseases of Aninals 
strong enough to sustain the weight well. The con- 
dition is most frequently observed in heavy-bodied 
puppies. The treatment for softening of the bone is 
to give liberally of foods containing mineral matter, 
such as meats, a little ground “green” bone, bran and 
lime-water. Milk is also excellent. Especial atten- 
tion should be given to keeping up the general health 
of the animal. 
BRITTLE BONES 
Bones naturally grow more brittle with advancing 
age, but abnormal brittleness may occur in young ani- 
mals,—due to an abnormal amount of mineral matter. 
The causes of this condition are not understood, but 
it is generally believed to be due to some defect in 
nutrition. Medicinal treatment does not seem to be 
of benefit. The diet should be carefully looked after, 
the bowels kept open, and the general health promoted 
by a variety of food, fresh air, sufficient exercise and 
sunlight. 
CARTILAGE TURNING TO BONE 
As animals grow old and the bone becomes brittle, 
there is a tendency for the cartilage or “gristle” of the 
body to ossify, or turn into bone. This condition some- 
times occurs in young animals. There is little help for 
it; the only treatment is to look carefully after the 
animal’s diet, and supply food and water that contain 
little salts of lime. Rain-water is usually preferable to 
well- or spring-water for this purpose. Bran and 
animal foods should be avoided as much as possible. 
