Some symptoms include disequilibrium causing an ataxic, or drunken, gait. In addition, dilation of pupils can occur, along with the partial protrusion of the third eyelid.
If no physical signs are present, note whether the eye pupils are the same size, or react normally to light. If not, this is a medical emergency. See vet immediately.
Distinguish head trauma of a concussion in cats by a skewed head, dilated pupils, seizure, rigid limbs, vomiting, and a bleeding nostril and/or ear canal.
