What a cutie @TheSunIsStillShining !
Thanks again @Fluffycloudland77 and others for your advice on my post-op kitty issues. After the lethargy and low appetite she had her 3 day check this morning and is doing fine according to the vet. Yesterday we experimented with no jacket, and she perked up but kept washing her stitches. Then we tried her brother's old cone of shame and she was energetically trying to remove it but also playing with a ping pong ball.
Then we put the jacket back on and she stopped all activity and just sat or lay down looking sad. So I stopped worrying so much and decided it she mainly has the huff over having to wear the jacket.
Her brother is still not talking to her. He came over to smack her round the face this morning then stalked off to sulk that he doesn't have a playmate for now.
Hoping they will be thick as thieves again once the jacket is off for good!!