126 ANIMAL INTELLIGENCE 
Several others were tried, but, while roused in a 
measure, did not growl, and even the first one soon 
ceased to react. 
Although ordinary sounds do not rouse them, feelings 
of discomfort do, for they rarely or never empty the 
bowels or bladder now where they lie, but move aside 
to do so. As in the case of rubbing the back, reflex 
effects get fainter and soon cease. 
18th day.—Being without food for three hours the 
puppies are very active. They walk about with tails 
up, and play with each other. 
In order to determine whether they are still guided 
by the sense of smell or by sight also, two of the 
puppies were removed from the pen and their eyes 
bandaged, but this seemed to confuse them and render 
them so uneasy that no conclusions could be drawn. 
However, when they are held up before a good light, 
they follow with their eyes the movements of the hand 
or other object; nevertheless, when they reach the dam 
from the distant part of the pen, it is difficult to 
determine how much they are guided by sight and how 
much by smell. I am convinced that, while the former 
is an aid, smell is still the most useful to them in all 
such cases. 
The peculiar noise made with the lips to attract the 
attention of dogs, which I may term the lip-call, is 
evidently heard, and as the position is shifted the 
puppies follow the sound to right and left. While the 
dog-whistle is heard, it causes reflexes of the ears and 
some startling, but does not rouse them so thoroughly 
into movements as the lip-call and certain other 
sounds. 
When an attempt is made to plug the nostrils with 
cotton wool, it is at once sneezed out reflexly. 
Judging by the whining and crying after fasting, 
hunger is more keenly felt than ever. 
