Alternatively, you could break the yarn after knitting the button hole band, knit the button band and then pick up the neck band stitches. The other benefit of doing that is you wouldn't have a needle holding the neck stitches getting in your way while you're knitting the button band.
While I was working all of this finish work, Fred came downstairs - I had left his door open as he had shown that he was consistently using his litter box. He looked around the room a little, then got up on the daybed - using a pile of knitting magazines as a step - gave himself a thorough bath and settled down for a kitty nap. He's doing much better. We're still shutting him up in his room at night and during the day while we're at work. He's still a little wobbly and we have a pretty big house that is not really kitty proof, I don't want him getting stuck somewhere.
Yarn: Finch by Quince & Co in Crocus
Needle: US 2.5 (3 mm)