It is a serious condition due to poorly known lesions of the nervous system. It is one of the crippling vices and is incurable.
It manifests itself in the following way: daze, fixity of gaze, incoherent attitudes, the animal does not react to the various stimuli, if one crosses the anterior limbs, it keeps them in this position ...
The evolution is towards a paralysis, or towards the syncope, asphyxia or even pneumonia.