Jacks, Jennets, and Mules 365 
Usually this cross is harder to obtain than the cross 
producing the mule, as the stallion usually refuses to 
breed jennets. This necessitates that the larger number 
be produced by artificial impregnation, or by a stallion 
that has been raised in company with the jennets, and 
not allowed to serve mares. Because jennets are smaller 
than mares, it has been argued by many that the cost 
of keep is correspondingly less and therefore the hinney 
is a more profitable market animal than the mule, as the 
feed for the jennet costs less than for the mare. One diffi- 
culty with the enterprise is that good jennets are not 
used for the production of hinnies but for the production 
of jacks, and therefore the smaller and pony-like jennets 
are the ones used for hinney production. This results 
in a small type of animals of low marketable value. 
The other difficulty is in the management, on account 
of the use of artificial impregnation or the care 
which must be taken with the stallion. It is probable 
that hinney production will be increased to some extent 
in the future, but it is extremely doubtful whether it 
will ever become large enough to produce any noticeable 
effect on the market situation. 
