Q. My horse continually shakes his head while I work him. What could be causing this.??
DR. ANDREA M. BRODIE, DVM
A. There are various possible causes: 1) have his teeth checked. His bit could be hitting so-called wolf teeth, which need to be removed. 2) He is fighting the bit in general....this would be a matter of training 3) he has an upper respiratory infection for the air sacs (caused by bacteria or a fungus)....a vet needs to diagnose this with an exam and possibly some diagnostics including an endoscopy, if warranted. 4) Lots of flies or other insects in your area----remedy with fly spray.
These are just some of the causes. I would have him checked out by a veterinarian.