.....and what's new in the mugumogu household, then - dazzlenation?....and so why do cats 'chatter' at birds?...you would have thought that it might be counter-productive....lol....go figure:

羽のおもちゃにクラッキングする子ねこ。-Kitten Miri does cat chatter to the feather toy.- - YouTube

'frustration'....looks like the right answer:...antagonised, perhaps?