https://www.vetnurse.co.uk/f/clinical-discussions/20925/cats-mouth Why would a cat&#39;s mouth open and not want to close, with the appearance of lock jaw, not lasting very long but obviously painful at the time?? Has anyone come across this before, cat was sitting there washing his feet, next thing he was prettyen-USTelligent Community 10https://www.vetnurse.co.uk/thread/140984?ContentTypeID=1Tue, 19 Mar 2013 21:56:51 GMT1a0763ec-3885-442c-853e-6cef656dfec5:9c7f90e9-78f5-4b47-993f-ea490a2fe0ccSmegSlayer<p>maybe his jaw clicked out temporarily? Don&#39;t know if it can happen in animals but happened to me all the time as a teenager and could be quite painful at times</p><div style="clear:both;"></div>