Page 679 - The Veterinary Care of the Horse

discharge which occurs especially when the horse has its head down, e.g. when grazing. The

discharge may have an unpleasant smell. Sometimes the pus forms hard lumps called
VetBooks.ir chondroids which are like pebbles and cannot drain from the pouch(es). The horse’s pharynx
may be swollen, causing difficulty with breathing and swallowing and the pouches may be

visibly distended (Figure 15.12). In chronic infections neurological signs may occasionally
be seen due to cranial nerve damage e.g. difficulty eating, facial paralysis and Horner’s

syndrome (see page 454). Horses with a chronic, less severe infection may show loss of
performance.