This injury, which is not uncommon in dogs, is usually due to a kick. The symptoms are pain on manipulating the part, the breathing is short, the ribs are more or less fixed, and crepitus can be hoard if the ear is applied to the ribs. The ribs should be bandaged rather tightly, to prevent undue expansion of the chest walls, and this will generally effect a cure, if, however, the lungs are injured, then such complications as pneumonia or pleurisy may arise. A mild aperient is always beneficial.