134 ANIMAL INTELLIGENCE 



all to move quickly away with tails down and other 

 expressions of fear. 



34:th day. Tested them with a napkin and Spratt's 

 dog biscuit as on the 28th day. * Now they all show 

 very decided preference for the biscuit, which is not so 

 attractive as a bone to any dog. One or two began to 

 smell about the floor of the pen as an old dog does, and 

 yesterday one was observed scratching at a spot on the 

 floor where some excrement had been. 



At this age puppies have very sharp teeth, and it is 

 not very uncommon now to hear one cry out when his 

 fellow uses his jaws too freely in play. 



Scratching is more common. 



While the winking reflex, from a simple movement of 

 the hand as before, is not readily produced, a sudden 

 tap on the ledge of the pen will cause winking if they 

 are looking that way, and within a foot or so of the spot 

 struck. They also wink when the muzzle is suddenly 

 touched. 



36th day. They now retire to one end of their pen 

 to answer nature's calls. 



They are noticed smelling at the shoes of any one 

 who happens to be near them. 



They 'bark in sleep like older dogs. 



When the finger is thrust into the mouth some suck 

 a good while, some not at all. 



36th day. They follow me around their kennel 

 compartment, and are inclined to seize the skirts of a 

 very long coat I wear. By way of testing recognition 

 of the dam, she and her other puppy, eight months old, 

 and nearly as large as herself, were brought to the 

 puppies together. They all at once rushed to the dam. 

 But soon after her removal they attempted to suck the 

 younger bitch, though from their sniffing it seemed to 

 me they noticed her strange. 



Later in the day the small bitch (Bedlington terrier) 



