Interestng theory. Chittering is also in ultrasound, so it could well be a sort of hunting call to fellow cats. However cats aren’t exactly social hunters. Also, it’s anecdotal, but due to the fact that mine sometimes just sits in a room and chitters at me ( sitting in another room ) while fixating me with its look when bored has me leaning towards the frustration hypothesis.
This is potentially the worst possible outcome for this whole debacle. This way the austrian conservatives earn points because they managed to restrict the percieved illegal immigrant flow from the east. Also the current governing parties in romania get to keep their crooked border staff, through which they siphon hundreds of millions of euro, as well as earning some electoral points. This partial agreement will also make sure that further schengen talks can be put on the back burner. And in the end the true beneficiaries of a schengen accord - romanian/bulgarian businesses that ship by truck - will get the shaft. Oh, and this whole scandal plays right into russia’s hands, as this will fuel serious anti-eu sentiment in romania.
Again?
But seriously, if kitty got up there kitty can get down ( most of the time ).