Hello, and welcome to BYC. If they are laying, they may stop after a couple of days. Eggs that will be laid are already 'in process'. Chickens hate change so they may take a couple of weeks to adjust before resuming egg production.
Mom had her sayings.
"Getting old is not a sin,
but acting old is."
One that now strikes home
"Getting old - not for sissies."
Pain is not my friend.
The worst ageing part:
"So many that you care for
are already gone."
Melancholy day.
Tomorrow will be better.
Sunshine lifts spirits.
:( All three of our goldens died with cancer. I had one beagle with lymphoma, and he maintained good quality of life on Prednisone for six months after diagnosis. I wish you luck with Elliot.