How long do you let a hyacinth keep an unfertilized egg.

by Peter
(Florida)

This is the 7th egg 6 in the summer and now one in October we have tried taking it away and letting her sit for a week or two. Concerned for her health. We give her a cardboard box so that she doesn't lose her food to bottom of tray. We will take box away and see what happens.
She is about 28 years old hand raised, she started laying eggs a couple of years ago this year though she seems to be constantly laying.
Any help appreciated.