Tessa is 19 and a half now and over the last six weeks has started to
go a bit strange. Once while trimming her claws she got very agitated
so we left her, she staggered across the room and slumped down looking
a little glazed and vacant, after about 5 minutes she recovered, had a
drink of water and seemed OK again. A week or so later she had a
violent coughing fit and again staggered about then slumped looking
vacant for a while then recovered and a few days ago did a similar
thing but not with the coughing. Between times she seems fine for an
old cat, sleeps mostly but stills gets around, up and down stairs,
outside to toilet and is happy to sit with us and  purrs alot when
petted. Any ideas what might be causing the vacant/glazed over
episodes? She is eating resonably well and drinks a lot of water.